Malicious PDF — malware analysis report

Static analysis result for SHA-256 987a1f9f24d4807f…

MALICIOUS

PDF

51.2 KB Created: 2020-08-03 19:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 038ec06c68c0e4a56957eadafa715a63 SHA-1: 1c34879a6f6594a40b1d973ba6251c6eff020eb0 SHA-256: 987a1f9f24d4807f6a900c154af624b67467c785f59ce790e5cf8d18665000a9
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is part of a link farm strategy. The document body, though heavily garbled, contains text related to French learning resources, likely a lure to encourage clicks. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be tricking the user into visiting the malicious URL.

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=livres+pour+apprendre+fran%25C3%25A7ais+pdf In PDF document text
    • http://files.mrsrussellsclassroom2018.com/uploads/1/3/1/4/131406303/2579080.pdfIn PDF document text
    • http://files.layoverfriend.com/uploads/1/3/0/7/130739333/4f41b2197590657.pdfIn PDF document text
    • http://files.noelcustoms.shop/uploads/1/3/1/3/131398392/penonogoledekutiw.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/1/0432/3812/9823/files/mupoturu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8667/6117/files/nv_dmv_bill_of_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/pamak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87960197539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2223/8374/files/20682704978.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/44660705976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/jasudojidosafazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3880/2073/files/nuxejip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3504/1693/files/5272309261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/83457564286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2580/0087/files/2737552377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/79820397470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1077/5464/files/berserk_2017_torrent.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 3

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_off00007043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7043 5188 bytes
SHA-256: 989019d43de4719beb4e1522e858a9eb1bd43f9a3f6644dd474a56197ab21391
font_01_sfnt_off00008203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8203 11848 bytes
SHA-256: a6b8e890704e553fb0866e7e052c06ea720a3dbd29e600b87cf9df996177a234
font_02_sfnt_off0000a7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7C5 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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