Malicious PDF — malware analysis report

Static analysis result for SHA-256 a376816fa172f5a3…

MALICIOUS

PDF

43.3 KB Created: 2020-08-06 01:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 88928f063c1d95826e1f8ec8084f3a88 SHA-1: ec330d62ac8c98b487c7774a040cb1f5757e64b6 SHA-256: a376816fa172f5a31855e9debd0fbfbe3256b4633a84d966741bcf1c6c595dc4
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, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=big+bang+theory+science+facts+pdf', is designed to lure users by appearing to offer science facts. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The primary malicious link likely serves as a gateway to further malicious content.

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.cc/pify?keyword=big+bang+theory+science+facts+pdf In PDF document text
    • http://files.sparklecleaning.net/uploads/1/3/1/6/131637037/xirij_zulevulaf_kovufu.pdfIn PDF document text
    • http://files.cohobrewing.com/uploads/1/3/1/3/131380397/rukefe_mupomubujuma_goxin.pdfIn PDF document text
    • http://files.saarticambodia.com/uploads/1/3/0/8/130814644/4c7fa.pdfIn PDF document text
    • http://files.clowninstitute.com/uploads/1/3/1/4/131437660/3b84b2bd1e.pdfIn PDF document text
    • http://files.electrolysisandco.com/uploads/1/3/1/6/131636745/1357350.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/1/0440/8328/2070/files/xisifasowewag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/73198631355.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/masofibefakovotaxugawaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/89875474994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8358/6974/files/pedubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/fimupojavik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/xepubaxesarusasifazelupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/comment_fusionner_deux_documents_en_un_seul_sur_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/dutuvunazuwudegukide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/21307298762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/35399541051.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 8

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_off0000698a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698A 5676 bytes
SHA-256: 7a183622e2cacf2d5e8f20d91c38b9a836a66250936fb2bd3572d088022ce29c
font_01_sfnt_off00007ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE3 10436 bytes
SHA-256: 19f826195cb122e0742e380a1ef5c015d044100076bfa494a7f3dfaa20c38946

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