Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a2f8441a5953c8…

MALICIOUS

PDF

32.5 KB Created: 2020-08-25 12:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c655469ff5dd8ad52da381ca76d6455 SHA-1: ef2c363252eb061280fceea94225d8d873f122d4 SHA-256: 57a2f8441a5953c854355c140c138faf7730a5e45540fae31944d5297a3348f6
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=elika+460+spec+sheet'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and benign-looking Shopify URLs, suggesting a lure to disguise the malicious intent. The primary attack pattern involves redirecting the user to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=elika+460+spec+sheet In PDF document text
    • http://zofibek.bellringeratx.com/uploads/1/3/0/9/130969465/8327643.pdfIn PDF document text
    • http://bodil.steveayottemusic.com/uploads/1/3/1/1/131164079/6656202.pdfIn PDF document text
    • http://files.lenoratrussell.com/uploads/1/3/0/9/130969562/wijagizufan-setod-sotivanuwaxapa-nofuxu.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/1/0431/6643/3435/files/kci_wound_vac_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2081/2441/files/occurrence_at_owl_creek_bridge_text.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/34610531519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2886/5446/files/82051976508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9427/8293/files/47721734190.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/17883298493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2969/0525/files/82763937037.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0467/9576/files/12236331288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/72455211728.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 1

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_off000042b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42B6 5332 bytes
SHA-256: 0187d1df42bbb59b4bbcd3fe28317e4ed56f6a7bf8639caeca2a9223933c54ca
font_01_sfnt_off000054cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54CB 9648 bytes
SHA-256: 08c8079b596db3b6939678b7b9add82571345c2fcd6239ae115687da54628529

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