Malicious PDF — malware analysis report

Static analysis result for SHA-256 07bbc3db96087e83…

MALICIOUS

PDF

46.6 KB Created: 2020-08-25 00:22:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66c1fa3a2fbe6dab727225836a58f981 SHA-1: d879484d206ee307148dc022beee96e0ec5c3cb4 SHA-256: 07bbc3db96087e83b2457c70890e29e54ef4e9cd77b310381a8e61fd55b613ab
174 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body also contains the URL 'https://ttraff.ru/pify?keyword=avast++windows+7', suggesting a lure to a malicious site. The presence of a link farm and a callback phishing lure heuristic further supports the malicious intent. No scripts were extracted, but the embedded links are the primary attack vector.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=avast++windows+7
    • http://bobifabo.rayoflightwitness.com/uploads/1/3/1/4/131407406/getelatonak_jamutimaxakepu.pdf
    • http://files.misfitspolitics.com/uploads/1/3/0/7/130739060/wilew.pdf
    • http://lovul.lotusranch-homes.com/uploads/1/3/1/4/131454215/savupuvesun-jorunazan-muwamanija.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/3736/6174/files/wufowajadagibovome.pdf
    • https://cdn.shopify.com/s/files/1/0430/4322/5751/files/57722293675.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3383/files/the_umbrella_academy_imdb_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/5474/3200/files/tusuzujoxezit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdf
    • https://cdn.shopify.com/s/files/1/0465/5788/8662/files/68190893610.pdf
    • https://cdn.shopify.com/s/files/1/0430/9182/0711/files/beyond_burger_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/les_accords_de_guitare_acoustique.pdf
    • https://cdn.shopify.com/s/files/1/0433/6438/4927/files/zopinave.pdf
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/9547903349.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/gukijuza.pdf
    • https://cdn.shopify.com/s/files/1/0435/9133/6099/files/81982079194.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_off00007896.bin
648ae8fab4ec26b4804627f2ee2931850735fa8f1ac88de7cb6c047d1024a828		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7896 4912 bytes
font_01_sfnt_off00008976.bin
915c268653a51f435a23a5e33300bdbeebe7c20fef4e404b48b12432043c1f96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8976 10704 bytes

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