Malicious PDF — malware analysis report

Static analysis result for SHA-256 31e6a97c89b3b301…

MALICIOUS

PDF

45.7 KB Created: 2020-08-02 15:16:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6ffa217513a379e4fab39154f6999c64 SHA-1: f7830af2e767de740a15bcbcaf232de6019c721b SHA-256: 31e6a97c89b3b30177f3c010fdb418f87abc3afa98577d54fdeecd72cd7c8ac0
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Recognize font from pdf' and the malicious URL, suggesting a lure to trick users into visiting the redirector. The redirector likely serves as a gateway to further malicious content or exploits.

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=recognize+font+from+pdf In PDF document text
    • http://files.virtu.rocks/uploads/1/3/1/3/131380342/2c7332ce04ee8.pdfIn PDF document text
    • http://files.bluerockheights.com/uploads/1/3/0/7/130739251/vaxuleroniburumixoxe.pdfIn PDF document text
    • http://files.theislamicummah.org/uploads/1/3/1/0/131071067/b5c40c00e.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/1/0428/9875/1641/files/87405639089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5965/8398/files/33328146518.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/26753461148.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3842/5767/files/fomotoxomifefezoxit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5072/1699/files/46365219575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/73536130703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6454/0835/files/66437931566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8910/files/87654716210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/tupigaxolatopujiluro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6436/8021/files/trie_implementation_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44329390643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5543/8241/files/murasefudurifori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/faritejugegunamigirepaxiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C2 4900 bytes
SHA-256: ad7db620b26b89f32d96f3c8ae945fc298be4375308cda58b096713033075941
font_01_sfnt_off00007959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7959 10164 bytes
SHA-256: 05f0a91b5e19007fd2319b5adab71bcd03c074b532cb5f724bb1a8e265771765
font_02_sfnt_off00009c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C22 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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