Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec65e92dbb5d17f…

MALICIOUS

PDF

40.5 KB Created: 2020-08-05 08:29:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccdf79845aef0f270dc310495c94da34 SHA-1: ce40561ae3c9802cc95b8ac26ae6da9b4ffcf42b SHA-256: 3ec65e92dbb5d17f7264d2b3f7cb477e1d0bcda45e80863853dc31674f0a31d4
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded URLs, constituting a link farm. One of these URLs, https://ttraff.ru/pify?keyword=sexual+and+asexual+reproduction+test+pdf, is identified as a malicious redirector. The document's structure and the presence of numerous links suggest an attempt to distribute malicious content or engage in SEO poisoning, potentially luring users to malicious sites under the guise of legitimate-looking documents.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=sexual+and+asexual+reproduction+test+pdf
    • http://files.mrstuckeysclass.com/uploads/1/3/0/7/130776841/4143467.pdf
    • http://files.scarekrogames.com/uploads/1/3/0/8/130813852/namuxopifalov_lubudodetijuj_meletaga_sazeket.pdf
    • http://files.kimchihana.com/uploads/1/3/1/3/131382907/xopobiniviso_waxekakadu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9222/9787/files/83384178363.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/25781613666.pdf
    • https://cdn.shopify.com/s/files/1/0438/2926/4546/files/viwinapaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/9437/6599/files/java_calculation_code.pdf
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/3120760891.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/38332750191.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/32690852548.pdf
    • https://cdn.shopify.com/s/files/1/0437/7319/8497/files/xobowi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/57590696331.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/63041921379.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fbf.bin
03303bbf3ab3958dd9909501deecc130cec481333f0df2f0cc1a65d37ccc4426		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBF 5320 bytes
font_01_sfnt_off000071ec.bin
99fb029e2cd59df51122eabdc771f9de0ba1dd258018a9ecb4185aaa2ddff130		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EC 10308 bytes

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