Malicious PDF — malware analysis report

Static analysis result for SHA-256 45848dd007220f86…

MALICIOUS

PDF

50.4 KB Created: 2020-07-10 02:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 5f65ab2fbc73a0ca232dc0d75a83371d SHA-1: b0d895d92c153f32d1dbb7b3ea4e4d1a1e73c99b SHA-256: 45848dd007220f869b8d81668592c4100d5d0ec7be08b2497cea51c413f9c757
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to SEO-optimized PDF files hosted on various domains. One prominent link redirects to 'ttraff.ru', a known malicious redirector. This suggests the document is part of an SEO spam campaign designed to drive traffic to malicious sites, potentially for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/wb?keyword=harmonielehre%20piano%20pdf In PDF document text
    • http://files.frosttechlab.com/uploads/1/3/1/6/131637841/riwodiju-sopup-sefojoweg-gajajipiva.pdfIn PDF document text
    • http://files.avanvive.com/uploads/1/3/0/8/130815093/2536565.pdfIn PDF document text
    • http://files.caregiverinspirations.com/uploads/1/3/0/9/130969381/1589048.pdfIn PDF document text
    • http://files.termarkleather.com/uploads/1/3/2/6/132682665/85b01c3aa355523.pdfIn PDF document text
    • http://files.worldmusicpedagogy.com/uploads/1/3/1/4/131453526/2251174.pdfIn PDF document text
    • http://files.louisvilleccc.org/uploads/1/3/0/8/130813897/c2e86b82384c2.pdfIn PDF document text
    • http://files.chesapeakewoodartisans.com/uploads/1/3/2/7/132740779/ronog.pdfIn PDF document text
    • http://files.iosociety.org/uploads/1/3/0/8/130814120/2351562.pdfIn PDF document text
    • http://files.susiestewartportfolio.com/uploads/1/3/2/6/132682565/2332276.pdfIn PDF document text
    • http://files.b-wellnow.net/uploads/1/3/1/6/131606335/padadominavilokitewa.pdfIn PDF document text
    • http://files.mitchadvent.com/uploads/1/3/1/4/131438099/3003701.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lovugamu.files.wordpress.com/2020/06/vemosezarimiramek.pdfIn PDF document text
    • https://samizoz.files.wordpress.com/2020/07/bogebonilemavoxotefiveg.pdfIn PDF document text
    • https://kogovabazoro.files.wordpress.com/2020/06/vafibalum.pdfIn PDF document text
    • https://mebanome.files.wordpress.com/2020/06/48788932042.pdfIn PDF document text
    • https://xoxabolagiw.files.wordpress.com/2020/07/wamebo.pdfIn PDF document text
    • https://zobekak.files.wordpress.com/2020/06/33300773002.pdfIn PDF document text
    • https://dezulav.files.wordpress.com/2020/07/vidatipuvoredam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47948794002.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7444 4772 bytes
SHA-256: 10733c8d9a5e1b64729399a5163452a4999b3398f58ae446ce8a6dbe3f59aa40
font_01_sfnt_off00008437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8437 10036 bytes
SHA-256: 84da416fcbb05ac94b97f2425ba3a3cd4af2b4989ba0bee2ece124684bd27d7b
font_02_sfnt_off0000a6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6D1 16120 bytes
SHA-256: 2cfc97915d250804213c9b0e6ad261e0979cd38371fb36ec9174dea58a153a3e

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