Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a77722ffd080e90…

MALICIOUS

PDF

44.0 KB Created: 2020-08-05 14:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6b56e434cb488c486832497b0a625451 SHA-1: be2627ffaab9de9d182ecfad1ac8c0edd2023697 SHA-256: 4a77722ffd080e90b1ae34d4638424e7ab04e7c411a57631414910c249a9ccf4
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is further supported by the embedded URL pointing to a suspicious domain. The document body text is obfuscated but contains keywords related to search results and a URL, indicating a lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning to attract victims. No scripts were extracted from this sample.

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=bise+sukkur+matric+result+2020+pdf+download In PDF document text
    • http://files.fairfaxfletchersoccerclub.org/uploads/1/3/1/8/131871484/wosunolojutil-nejimivixeg.pdfIn PDF document text
    • http://files.realestateleadsprospector.com/uploads/1/3/1/0/131071043/6c01eb76b.pdfIn PDF document text
    • http://files.nienkemink.com/uploads/1/3/0/9/130968920/bevuxebusosobogati.pdfIn PDF document text
    • http://files.huntershealingcalls.com/uploads/1/3/1/4/131438216/vumevatazagovo.pdfIn PDF document text
    • http://files.robmatthewsmbe.net/uploads/1/3/1/3/131381679/konusekexemutelo.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/1/0438/8909/8907/files/73633775288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9073/8328/files/seek_and_destroy_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/63012798303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3512/2081/files/27692921176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3559/8758/files/41434063373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3723/7146/files/kepepujadelukoxuzozusilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1863/9765/files/mathematics_grade_9_teachers_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3797/2897/files/jedagikopubijipeka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2569/4883/files/79362480717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/tapulifufapeditifujolasif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/lozesefitugokifakomirep.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 6

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_off00006536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 5780 bytes
SHA-256: e03373b4fdb951cdb2f5bfa2e1d60c449c9530bcc2cab9ed9d4b6fc38eba3c30
font_01_sfnt_off000078e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E4 13352 bytes
SHA-256: 9ba515af1606bedb75fc72bf4be0ff6bf0d8a37c12ccbb7e68f98eea61f66a4f

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