Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ec89c4dfc03338…

MALICIOUS

PDF

34.8 KB Created: 2020-08-01 04:22:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d535d5904e4389eb0281c101e8605c0 SHA-1: 2f12ec6b671517425f438d12dae246bb92445c67 SHA-256: 17ec89c4dfc033389004ecd1a97925de6f76f01027eda7b25c8f11ece7a0417b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing indicating it links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=foodsaver+repair+manual`. It also exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify-hosted PDFs. The document body, though heavily obfuscated, contains the lure text 'Foodsaver repair manual' and the malicious URL, suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=foodsaver+repair+manual
    • http://files.purpleheartoutdoors.org/uploads/1/3/0/7/130776343/rapim.pdf
    • http://files.aminakhalifa.com/uploads/1/3/1/6/131606016/bazitizu-pujavokemojug-sinedebusewonib-deramanumafiziv.pdf
    • http://files.rustynailsmn.com/uploads/1/3/0/7/130739987/sunozumuzone.pdf
    • http://files.deltabassclub.com/uploads/1/3/1/4/131438784/mubim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rasebiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/10094275360.pdf
    • https://cdn.shopify.com/s/files/1/0431/1865/7697/files/92353617792.pdf
    • https://cdn.shopify.com/s/files/1/0428/1001/5910/files/liwunifigaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/0634/5895/files/17354462095.pdf
    • https://cdn.shopify.com/s/files/1/0434/5466/0758/files/kuvofifog.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/90610192382.pdf
    • https://cdn.shopify.com/s/files/1/0432/8095/7598/files/fibomowirogawabasorenaruj.pdf
    • https://cdn.shopify.com/s/files/1/0438/3784/9762/files/82781487241.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048c6.bin
846aede4bb03d09f9074768608b264bc9c7b01b50d87913f6ba804228faabaa5
pdf-font-stream PDF embedded font (sfnt) at offset 0x48C6 5120 bytes
font_01_sfnt_off00005a22.bin
ad95b285d54d5267b2396722d2add9565884db8c5b033be8adfa04774d8be942
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A22 10628 bytes