Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d205706a852631…

MALICIOUS

PDF

37.6 KB Created: 2020-08-12 02:18:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a294e0d5e8f46dc2fc89198f06ba770d SHA-1: 745f1acdd9990b61378a799757f35a1982ef76eb SHA-256: a1d205706a8526314b993af30d2fa8e2609c1872f0d26c7736b30f5abb55c7c7
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a malicious redirector link to 'ttraff.cc', which is flagged as malicious. Additionally, the document exhibits characteristics of a link farm, with numerous embedded URLs pointing to PDF files, likely for SEO manipulation or to host further malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, but the primary attack vector appears to be the redirection to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.cc/wb?keyword=counting%20quarters%20dimes%20nickels%20and%20pennies%20worksheet
    • http://files.thepeoplesroaster.com/uploads/1/3/0/7/130740097/1133841.pdf
    • http://files.embarrass.org/uploads/1/3/0/9/130969459/dokupugaderenejetuf.pdf
    • http://dolija.awomanandherstories.com/uploads/1/3/1/4/131438641/jezugamase.pdf
    • https://cdn.shopify.com/s/files/1/0429/3964/6108/files/vidazugexebojaku.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7341/files/65774005159.pdf
    • https://cdn.shopify.com/s/files/1/0433/4672/2965/files/sepiwijadafadov.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48675385277.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3936/files/53463286681.pdf
    • https://cdn.shopify.com/s/files/1/0430/0318/3258/files/car_research_xrm.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xifenawapuvesuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/8271/9136/files/9442422122.pdf
    • https://cdn.shopify.com/s/files/1/0434/2389/1621/files/financial_accounting_theory.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_off000053f1.bin
2f565180e837739609ac93bbe9040cf328e614a0160103c3214a7b2eb3dd648c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F1 5676 bytes
font_01_sfnt_off00006722.bin
2706664c200517b0e64ca93850ea022b99dd400f889eb7b6a71599d3ad1f61f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6722 10152 bytes

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