Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd529a1e2305577…

MALICIOUS

PDF

46.9 KB Created: 2020-07-16 05:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 95f491e8c4ad06f47ff406d73ee259a7 SHA-1: 6ad6760f576f4be2069663650c80d87c7a7c3523 SHA-256: 5fd529a1e2305577c6479c24c978faa7f5e84161f8f4336d8c16ec3718a185b9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external resources, many of which are hosted on domains associated with SEO link farms and redirectors. The primary redirector URL, 'https://ttraff.com/wb?keyword=proyecto%20de%20grado%20umsa%20pdf', suggests a phishing or malware distribution lure. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-related links points to an attempt to distribute malicious content or phish for credentials.

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.com/wb?keyword=proyecto%20de%20grado%20umsa%20pdf In PDF document text
    • http://files.fairviewlakestudios.com/uploads/1/3/1/1/131164239/17be5.pdfIn PDF document text
    • http://files.dopekonect.net/uploads/1/3/1/4/131438538/davexabodezugi.pdfIn PDF document text
    • http://files.artofarchitecting.com/uploads/1/3/1/4/131437143/5413051.pdfIn PDF document text
    • http://files.bestpickeddiets.com/uploads/1/3/1/6/131606465/1a697.pdfIn PDF document text
    • http://files.impact2020conference.com/uploads/1/3/1/1/131164011/9ddd0852d67.pdfIn PDF document text
    • http://files.emmashoosmith.com/uploads/1/3/1/4/131411542/dowimi_najimi.pdfIn PDF document text
    • http://files.janellecox.com/uploads/1/3/0/7/130775987/basoxozalujisod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sitekoj.files.wordpress.com/2020/06/zarukadox.pdfIn PDF document text
    • https://penigan.files.wordpress.com/2020/06/22680515710.pdfIn PDF document text
    • https://miwezoju.files.wordpress.com/2020/07/jiwivolutorejulisitexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0716/4064/files/nuferotevirefolat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51220099535.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6127/2983/files/8569338181.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9960/files/96982003897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/jidezavotuzarevat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/vesipotajewonejan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/rekujilekegirenaxorigis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6682/6656/files/85630233975.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000778b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x778B 5272 bytes
SHA-256: 578fb8a380fa8d92330ffca5aab3f0a6713c21f6b5536ad3356db4084e6a4466
font_01_sfnt_off00008982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8982 10904 bytes
SHA-256: 61f11924a86fefd14354f7588adb92f794373dd0fea984d0cdda05a2498852dd

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