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) First seen: 2026-05-08
MD5: 579339bcd9c3ee96f6589327cf78c02f SHA-1: d4b99e896aa941e077829ed980d5b9cd1624088c SHA-256: a7883ffdcc0045a5339e9047a53685d1d99b32aa68400d3b8da49a155f78dd09
242 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.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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
  • 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.cc/pify?keyword=remittance+advice+template+uk+free In PDF document text
    • http://nezatexem.fourcornerstack.com/uploads/1/3/1/3/131382243/4b77201341f.pdfIn PDF document text
    • http://gipoli.geoed1.com/uploads/1/3/0/7/130776757/suvuzaju.pdfIn PDF document text
    • http://gurul.mythoughtfulenglish.com/uploads/1/3/2/7/132712072/wisepivalopowuz.pdfIn PDF document text
    • http://dezojasuf.revdvorah.com/uploads/1/3/1/1/131164250/guboluvodovoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/tojisagekanoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9587/5989/files/15793662354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6596/5718/files/10292262344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/tesatudakesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/fudalegawewulimesiwapabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/liwisubusamepumiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3464/8482/files/funefetimuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2562/0374/files/budget_and_budgetary_control_mba_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4979/4213/files/51157798243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6952/2599/files/pdf_portfolio_for_graphic_designer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1960/6936/files/luwevi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D95 5028 bytes
SHA-256: e296714066c16605c8b12c26806cb79cc6a794812bc69f7da818c3407d6ab1a0
font_01_sfnt_off00006e98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E98 10312 bytes
SHA-256: 8a99831d1d795406b8945140579504d5967af0f8ad2c182593d0df3ddcc3aa65
font_02_sfnt_off000091e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91E0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378