Malicious PDF — malware analysis report

Static analysis result for SHA-256 55b10566b08169aa…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 02:43:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 01aa205788560a0141af692323608b22 SHA-1: c74f69730900084c6b9e8daf024d68608f3bfb6d SHA-256: 55b10566b08169aa432675f36e248ac80976cc09d12613c2a16e53b30ab56d67
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text referencing 'Collins connect book 2. 3 answers' and multiple Shopify URLs, suggesting a lure to disguise the malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many pointing to Shopify, likely to improve search engine ranking for the lure content and hide the malicious redirector.

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=collins+connect+book+2.+3+answers In PDF document text
    • http://tolefaf.soulcleanser.co.nz/uploads/1/3/2/6/132681482/5234406.pdfIn PDF document text
    • http://files.darnhallparish.co.uk/uploads/1/3/2/6/132683264/simalaganopoguweje.pdfIn PDF document text
    • http://files.pohchocolate.com/uploads/1/3/1/4/131407148/jodago.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/1/0428/1021/2518/files/naforolap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9000/9502/files/64449861362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6299/2795/files/98994308000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2873/2314/files/3632307695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3452/2279/files/poxekariguparokozo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/semi_cryogenic_engine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0671/3253/files/95198295599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/65922761871.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5705/7687/files/chiari_1_malformation_syringomyelia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9162/3074/files/nezun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4012/6614/files/53913508913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7233/1682/files/annotate_notability.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 2

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_off00006403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6403 5324 bytes
SHA-256: f72fba4ad9ead270a9e2d70e54a063bfd99bfb3bcce39e7fcf30160c5ebe59e8
font_01_sfnt_off00007639.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7639 9932 bytes
SHA-256: 1605d2919e8ad179e8b9d5ce4bd47609f9bcaa9cc10ec130d86661e60a951414

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