Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c15160d5c798d3f…

MALICIOUS

PDF

42.1 KB Created: 2020-08-27 22:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8077e8ed7fc39f21875953a77b9f149b SHA-1: a41470f9ffd037093867f9a9775a02806947987d SHA-256: 3c15160d5c798d3f492d504a6ba65f85897462cbc7bb1e61e57189f4c28b3cea
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=campbell+biology+chapter+17+study+gu'. This indicates a phishing or social engineering attempt. The document also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The primary malicious URL is the most critical IOC.

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=campbell+biology+chapter+17+study+gu In PDF document text
    • http://bivesi.shapiropage.com/uploads/1/3/1/6/131606552/lisomabu.pdfIn PDF document text
    • http://files.pieceworkjournals.com/uploads/1/3/1/4/131483371/bipip.pdfIn PDF document text
    • http://files.texashollandlops.com/uploads/1/3/1/4/131437233/fokipawobejevexigu.pdfIn PDF document text
    • http://files.frandaniellaucerica.com/uploads/1/3/1/4/131453843/61f4f0.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/1/0431/6472/9512/files/bouncemasters_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0262/5178/files/esl_prepositions_of_place_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4678/0566/files/92071941481.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0536/9758/files/pufekunegolekikofedubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/7899/6383/files/comparison_paragraph_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4862/3510/files/2011_cadillac_cts_coupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/pasuxizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7787/6377/files/49197025427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/36440623293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9681/0396/files/xavafesejiramun.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 4

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_off000063c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C9 5764 bytes
SHA-256: 5310c14a72aadc2578c4da3b539066a22f34fc691e62ea346bd81cfc8055955a
font_01_sfnt_off0000774b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x774B 10280 bytes
SHA-256: f99696211d5180ac9c63d72d0d0ab6e27de12d9aad06ad606bdce7e69f0aa195

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