Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ad6b3a9f12929a…

MALICIOUS

PDF

40.3 KB Created: 2020-08-12 15:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f6618d334a30ddc29b5d2f9d23f7557 SHA-1: 7b1a879ae7e33af37d697ce8df9f1f300be0ef78 SHA-256: a4ad6b3a9f12929ad7058314df54e542a067035c2142e1a2d178893e8da9638e
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at https://ttraff.cc/pify?keyword=english+phonetics+practice+pdf. This suggests the document is designed to lure victims to malicious infrastructure under the guise of providing practice PDFs. 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.cc/pify?keyword=english+phonetics+practice+pdf In PDF document text
    • http://files.resourcesforfrenchteachers.com/uploads/1/3/1/3/131398224/8296165.pdfIn PDF document text
    • http://piver.gusttechnology.com/uploads/1/3/1/0/131069934/kunelowolaxodaveker.pdfIn PDF document text
    • http://files.oceanpinesplayers.com/uploads/1/3/0/8/130874125/worotiwiganoj_damofil_xusowupexuxo_ruwalujek.pdfIn PDF document text
    • http://gosite.nicoletteward.com/uploads/1/3/0/9/130969352/3173904.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2732/5351/files/877351922.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/56851019328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7069/3284/files/15224373828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6821/files/66283753453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/regions_of_the_abdomen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/ipad_error_9006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/tejasugiziwaxiwelifugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0400/1443/files/advanced_calculus_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0042/1790/files/52126311636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/wuvifizanufuwove.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/ravojifoxilusawoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004def.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DEF 5164 bytes
SHA-256: d5e18b8f0baa55ffc331d74d0d195c53b7fd38767e8dcc03fef40d3659af81f8
font_01_sfnt_off00005f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6F 11576 bytes
SHA-256: c01311e5926a807a87f1f0802be6fcf78c5d651d8607b129bc55a525c436fe4e
font_02_sfnt_off00008631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8631 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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