Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fff625459435327…

MALICIOUS

PDF

39.3 KB Created: 2020-08-04 08:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30366c216c86eea71387796d8f596efc SHA-1: 6da3dee47da6ae09c0f22df7574ed8ff182a601b SHA-256: 1fff62545943532752e86e95f78494eab18f0f4f4371797d7b6a38bb1c25b2b4
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same malicious URL and other PDF links, suggesting an attempt to disguise malicious content within a seemingly academic context. The primary intent appears to be directing users to malicious infrastructure via the ttraff.com redirector.

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.com/pify?keyword=additional+mathematics+o+level+book+solutions+pdf
    • http://mowizinu.chapstickdiaries.com/uploads/1/3/1/3/131380845/zulovelolu_gajozozaj_bibeze_seneke.pdf
    • http://files.gasureplumbingandheating.co.uk/uploads/1/3/1/0/131070178/foruz.pdf
    • http://files.imaginariumindy.com/uploads/1/3/2/3/132302718/lipasazotopov.pdf
    • http://files.diversityunitkncirg644.com/uploads/1/3/1/3/131384663/2078501.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/gewemekawemabulafidito.pdf
    • https://cdn.shopify.com/s/files/1/0432/9363/8822/files/87427483172.pdf
    • https://cdn.shopify.com/s/files/1/0437/0300/9430/files/76531334344.pdf
    • https://cdn.shopify.com/s/files/1/0435/4310/1591/files/kappa_alpha_psi_rituals.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/bodybuilding_diet_plan_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/flowey_boss_fight.pdf
    • https://cdn.shopify.com/s/files/1/0435/3196/0474/files/tabatagefuxijubimilu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5321/2060/files/nuxajumesamojaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/cannot_find_required_map_name.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004df8.bin
f8f654d498f120ca1ad49070e5471a15c071a364c53c117f76b2506d68e56ebe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DF8 5432 bytes
font_01_sfnt_off0000604c.bin
eb728bb106cbcbed656fd184638012196eb34aa623887a119d5df983a3b4f251		 pdf-font-stream PDF embedded font (sfnt) at offset 0x604C 9848 bytes
font_02_sfnt_off00008206.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8206 4324 bytes

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