Malicious PDF — malware analysis report

Static analysis result for SHA-256 0173f3c888d74c46…

MALICIOUS

PDF

44.3 KB Created: 2020-07-21 09:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-07
MD5: afcc0bfbb3ec054d4141a79e33ba9802 SHA-1: 0f55de7caf8296fdb8eb741a137525980bc6b671 SHA-256: 0173f3c888d74c46cb63f9b2099dc9e7b8e7e7062e8eb588677181050e9f9f43
194 Risk Score

Malware Insights

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

The PDF contains numerous links to an SEO redirector, which is a common tactic for phishing and malware distribution. The ML classifier strongly indicates maliciousness. The embedded links likely lead to further malicious content or phishing pages, aiming to trick users into downloading or interacting with harmful files.

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=terminologi%20anatomi%20dasar%20pdf In PDF document text
    • http://files.redandgreenschool.org/uploads/1/3/2/8/132814898/gezejojogubujax.pdfIn PDF document text
    • http://files.themoveablechurch.org/uploads/1/3/0/8/130874128/9175303.pdfIn PDF document text
    • http://files.mpacf.shop/uploads/1/3/0/9/130969754/wefovedopad_sixunil.pdfIn PDF document text
    • http://files.inadocument.com/uploads/1/3/2/6/132696128/341013.pdfIn PDF document text
    • http://files.kingsvilleroofingcompany.com/uploads/1/3/0/7/130776511/95571f40a9a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6805/4949/files/vekis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/69700886403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdfIn PDF document text
    • https://pudaditi.files.wordpress.com/2020/06/mugofevukupinutef.pdfIn PDF document text
    • https://wajowobosub.files.wordpress.com/2020/07/kibosuxadipo.pdfIn PDF document text
    • https://nenodixivazu.files.wordpress.com/2020/07/72577119052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/jefamijurefiludom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/tunubisararalanub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/68685835867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6107/6375/files/78779117170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faramerujinusopuko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5574/2114/files/18032369369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/leraxekemikumesub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/wipekobapemoregudo.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_off000070fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70FE 5096 bytes
SHA-256: aff4f21747966dd0ea60f86eeb50f3dfaf4f21500b46a51b0ca82dc60156d354
font_01_sfnt_off00008231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8231 9920 bytes
SHA-256: 2b890fc18526d1ce020913c11542c2ae5b4e3d7c68fc338436da334edeef66f8

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