Malicious PDF — malware analysis report

Static analysis result for SHA-256 a881438aa1ad5b90…

MALICIOUS

PDF

42.3 KB Created: 2020-08-02 23:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b95a81cb3f9ed23b370de91df961e01c SHA-1: b1047ec41e0124afc93bfd43bab3bb2bb2033620 SHA-256: a881438aa1ad5b90056d85ce50bc410b8e66333a8bf71a33f6edb73975108a89
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=720p+vs+1080i', which is likely used to redirect users to further malicious content. The document also contains a large number of links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt to distribute the malicious content.

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.com/pify?keyword=720p+vs+1080i
    • http://files.tearsofglass.ca/uploads/1/3/1/0/131070713/dugukefiroruvud-vesixufavogagir-gatozanis.pdf
    • http://files.drkathrynkimball.com/uploads/1/3/2/6/132680808/zagelap.pdf
    • http://files.customcakesandcupcakes.com/uploads/1/3/1/8/131871633/tolonage.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/fowukubomuxitopur.pdf
    • https://cdn.shopify.com/s/files/1/0433/0445/2246/files/nudokomuwubodojuxira.pdf
    • https://cdn.shopify.com/s/files/1/0430/3601/6802/files/38911334004.pdf
    • https://cdn.shopify.com/s/files/1/0437/8070/2366/files/37899236765.pdf
    • https://cdn.shopify.com/s/files/1/0431/2819/3184/files/71160874310.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/bajitekogil.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wonazonuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/7099/7151/files/86778759126.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/rupofavutudojisuvoretadu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2356/4957/files/polished_andesite_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0435/6400/7583/files/25396570370.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_off00006994.bin
11dab0b365791a7eb3a8bc5757d81ec51183ba228aa3aac5bbec66eaf2be23b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6994 5040 bytes
font_01_sfnt_off00007ae5.bin
4606e7827be3f2b05ec817dab02419bec18a0f9c921e2bdde2bdd4f5c55c9715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE5 9980 bytes

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