Malicious PDF — malware analysis report

Static analysis result for SHA-256 a153f9fc7687b120…

MALICIOUS

PDF

35.6 KB Created: 2020-08-26 11:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ec1b60ed1c2e840932060cc25713e09 SHA-1: 8d80aef79e9b72c3219b07c64f259ae62cfaed32 SHA-256: a153f9fc7687b120123cc64fbb149ca7f1017dee48013da9d58d078a211a33e4
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to 'Fallout 4 vault dweller's survival guide download' and the malicious URL, indicating a lure to trick users into clicking the link. The presence of numerous other links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious URL.

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.com/pify?keyword=fallout+4+vault+dweller%2527s+survival+guide+download In PDF document text
    • http://files.petoskeymuseum.org/uploads/1/3/0/8/130814258/7060226.pdfIn PDF document text
    • http://files.cure-sort.org/uploads/1/3/1/3/131379894/da66a80.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/1/0433/0648/3876/files/92795720322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/6001/1675/files/appareillage_brique.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/pimobimobu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1172/6750/files/challan_form_no_32a_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9176/8984/files/lab_attendant_question_paper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/0594/4487/files/heavy_metal_f.a.k.k._2_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6179/7013/files/ccc_industry_trends_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/kabotijalexuwunijedidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/18543525412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7395/4204/files/nopaturesoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5580/7641/files/basic_electrical_engineering_book_by_abhijit_chakrabarti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5621/8780/files/92661274011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7206/0573/files/kipagevasediwaxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3638/4149/files/53811992944.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_off00004e26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E26 5224 bytes
SHA-256: 83ec90473d5f5da49d926560b982e744ffed17e354ace7fedeae0442ede9e0ca
font_01_sfnt_off00006019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 9808 bytes
SHA-256: 0bd3523f32dea21a40a8faa13a6cab73fc4f3c022c3aaaf47611ac34348e7f3b

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