Malicious PDF — malware analysis report

Static analysis result for SHA-256 0766264b118b325f…

MALICIOUS

PDF

53.5 KB Created: 2020-07-27 08:14:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e6c35982df89c67faff1f84110aced31 SHA-1: 6a644b81f76d26a85f8bc70f1ddf1f9df65b3dc2 SHA-256: 0766264b118b325f69a7b85336eb8dcdac44b1b5f195924189eee90cd9c2939b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a link farm designed to redirect users to malicious infrastructure. The primary redirector URL is identified as malicious. The document's content and structure strongly suggest a phishing or scam attempt leveraging SEO techniques to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=isolation+of+plant+pathogenic+bacteria+pdf
    • http://files.sarakross.org/uploads/1/3/0/8/130874101/973424c.pdf
    • http://files.michaelallensalsbury.com/uploads/1/3/0/8/130814229/3910707.pdf
    • http://files.inbalancepsychology.com.au/uploads/1/3/0/8/130813317/gosizomiwevo.pdf
    • http://files.healingreinsky.org/uploads/1/3/0/7/130740442/totuxapadever.pdf
    • http://files.fear-lesstherapy.com/uploads/1/3/0/7/130739265/1207411.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1097/2053/files/bavasumejulefasupive.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/bavar.pdf
    • https://cdn.shopify.com/s/files/1/0432/5143/3627/files/pamesusitarizog.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/89942231631.pdf
    • https://cdn.shopify.com/s/files/1/0432/6090/3582/files/gutovisir.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buwukepenarunowara.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.pdf
    • https://cdn.shopify.com/s/files/1/0433/3545/0774/files/37396952478.pdf
    • https://cdn.shopify.com/s/files/1/0431/0673/0138/files/80607128406.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/67518524192.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4375/files/33538590408.pdf
    • https://cdn.shopify.com/s/files/1/0433/3427/1126/files/73094350249.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/29137920957.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000936f.bin
34252f455564f603f1498629cce076aaa937d079f0c7a19356856108393b254c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x936F 5280 bytes
font_01_sfnt_off0000a54a.bin
012ec8b123e37bb8002f3b7abda20b119c8f294ec99b29c5dff8bc16ac221d02		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA54A 10276 bytes

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