Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7883ffdcc0045a5…

MALICIOUS

PDF

43.2 KB Created: 2020-08-14 06:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 579339bcd9c3ee96f6589327cf78c02f SHA-1: d4b99e896aa941e077829ed980d5b9cd1624088c SHA-256: a7883ffdcc0045a5339e9047a53685d1d99b32aa68400d3b8da49a155f78dd09
168 Risk Score

Malware Insights

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

The PDF contains a lure related to payment and remittance advice, indicated by the 'SE_INVOICE_LURE' and 'SE_PAYMENT_REDIRECT_LURE' heuristics. It embeds numerous links, with a critical finding being a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=remittance+advice+template+uk+free'. The document also functions as a link farm, pointing to many external PDFs, likely to manipulate search engine results or host further malicious content. No scripts were extracted, but the PDF structure and embedded links strongly suggest a phishing or malware delivery attempt.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=remittance+advice+template+uk+free
    • http://nezatexem.fourcornerstack.com/uploads/1/3/1/3/131382243/4b77201341f.pdf
    • http://gipoli.geoed1.com/uploads/1/3/0/7/130776757/suvuzaju.pdf
    • http://gurul.mythoughtfulenglish.com/uploads/1/3/2/7/132712072/wisepivalopowuz.pdf
    • http://dezojasuf.revdvorah.com/uploads/1/3/1/1/131164250/guboluvodovoj.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/tojisagekanoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/15793662354.pdf
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/10292262344.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/tesatudakesu.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/fudalegawewulimesiwapabe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8482/files/funefetimuru.pdf
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/budget_and_budgetary_control_mba_project.pdf
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/51157798243.pdf
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/pdf_portfolio_for_graphic_designer.pdf
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/luwevi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d95.bin
e296714066c16605c8b12c26806cb79cc6a794812bc69f7da818c3407d6ab1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D95 5028 bytes
font_01_sfnt_off00006e98.bin
8a99831d1d795406b8945140579504d5967af0f8ad2c182593d0df3ddcc3aa65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E98 10312 bytes
font_02_sfnt_off000091e0.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91E0 4324 bytes

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