Malicious PDF — malware analysis report

Static analysis result for SHA-256 a77e5db127c2506c…

MALICIOUS

PDF

44.3 KB Created: 2020-08-07 22:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 30fbec809d55d5561055f1f05f73bc4e SHA-1: 658cbc59e7e9d5f082e658b04225488d560963cf SHA-256: a77e5db127c2506c509043ac71d8bf62e43e093b5b07b69da6beab36778d259d
202 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The 'SE_INVOICE_LURE' heuristic suggests the document's content is designed to trick the user into clicking the malicious link. The primary malicious URL identified is https://ttraff.ru/pify?keyword=assertions+audit+pdf, which is part of a link farm hosted on Shopify. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.ru/pify?keyword=assertions+audit+pdf In PDF document text
    • http://files.rem5vr.com/uploads/1/3/1/0/131071166/kudegowurapul-dizoz.pdfIn PDF document text
    • http://files.workshoppersonline.com/uploads/1/3/0/8/130815437/4057435.pdfIn PDF document text
    • http://files.shirazgermanshepherds.com/uploads/1/3/2/7/132712006/4195524.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/zelevojova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/chrysler_pacifica_repair_manual_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zutazalurofesavasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/dodge_ram_symbol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7405/2503/files/rakex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8535/6449/files/65971241466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/80059932609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/4091239371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2565/2117/files/list_vs_set_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3347/3702/files/rupaul_drag_race_season_6_torrent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8778/1276/files/firixedokawire.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7069 4992 bytes
SHA-256: 1aaacd65824b7c639420a749b20602942ea3a55c883c4e7590a387f847bbd674
font_01_sfnt_off00008173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8173 10300 bytes
SHA-256: 919e85b5da82df82a5dcec102e854de4d26fe5e087f25afd0d29a9145de9c7e5

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