Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff902978de12dd11…

MALICIOUS

PDF

56.6 KB Created: 2020-08-25 06:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8b23c258658df496742668b785b22750 SHA-1: df356a4b42010234896039b5f87363ea5447cb9f SHA-256: ff902978de12dd11c92c38140d4758eeb5bb82c26a2b200a497ed0b5f62e5876
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating it's a malicious redirector, linking to a URL that appears to be part of a link farm. The document body, though heavily obfuscated, contains the same URL. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or phishing.

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=format+of+job+letter+for+class+12 In PDF document text
    • http://darirofo.wolfmatters.org/uploads/1/3/1/3/131379899/veberuganomeren.pdfIn PDF document text
    • http://vopofaket.penultimatephotos.com/uploads/1/3/0/9/130969264/kuxijapufidugoj-jomawizakog-zejejegekizudi-setobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/medical_vocabulary_english_spanish.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/hometown_vocabulary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3032/7975/files/63270850061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6345/9496/files/nurinamezenototobofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6862/8890/files/bexuzixegasagapozirizebam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/merriam_case_study_research.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3773/4550/files/65725899749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/xafilejaxovu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2409/7191/files/97366346442.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A74 5380 bytes
SHA-256: d5318ecbc09f8fe179c275542d2848d545235a3cc6996072bac4d1cb8a9c5d24
font_01_sfnt_off00008cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB3 10592 bytes
SHA-256: 53fc1aae19819f8b662b0d2c2cd954708c74643e5a7ba784c87a5e38415c184e
font_02_sfnt_off0000b0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0FA 16164 bytes
SHA-256: e296a61d2d303e35be9e1a35631556663d2780498efa7e8f3867bf557f172fe6
font_03_sfnt_off0000c64d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64D 3744 bytes
SHA-256: e7fa58bc570bf92b02006a17f98334035ccfaddd197145fd2b7f2c861e2ea979

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