Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede87df964a285ae…

MALICIOUS

PDF

39.6 KB Created: 2020-08-19 07:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7e304f2a1d8fcb805b6c1dc43a5a98b SHA-1: 4526148018f59cd807b50a011dc50682b579f8c9 SHA-256: ede87df964a285aebfd70445ecbf8920363ad691e58919b17cffe3f44a001d62
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically to 'https://ttraff.com/pify?keyword=caltrans+traffic+safety+manual'. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to disguise malicious activity. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points to a SEO poisoning or link farm attack pattern.

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=caltrans+traffic+safety+manual
    • http://files.loddiedoddie.com/uploads/1/3/1/3/131397927/bezom_rewudi.pdf
    • http://tifudasok.sunpowerfarm.us/uploads/1/3/1/4/131406082/8373484.pdf
    • http://mekul.egpphotography.com/uploads/1/3/2/6/132695471/paxalinajabezer-labetuposelizuw-mivinuzi-vupenowegad.pdf
    • http://files.adametranslationservices.com/uploads/1/3/2/6/132681342/sagole_viteta.pdf
    • http://files.happylivingmedicalsales.com/uploads/1/3/1/6/131637679/6613681.pdf
    • https://cdn.shopify.com/s/files/1/0437/8135/7725/files/regression_analysis_by_example_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/51157515211.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/34311160125.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/download_breaking_dawn_part2.pdf
    • https://cdn.shopify.com/s/files/1/0431/0591/0935/files/84418292016.pdf
    • https://cdn.shopify.com/s/files/1/0437/6172/9685/files/61157670289.pdf
    • https://cdn.shopify.com/s/files/1/0435/5106/4228/files/plautus_aulularia.pdf
    • https://cdn.shopify.com/s/files/1/0429/6785/9359/files/nikolai_ostrovsky_how_the_steel_was_tempered.pdf
    • https://cdn.shopify.com/s/files/1/0429/9119/0175/files/pelitud.pdf
    • https://cdn.shopify.com/s/files/1/0429/0389/6217/files/kuvujabejune.pdf
    • https://cdn.shopify.com/s/files/1/0438/0255/8621/files/intern_resume_template_word.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_off000050d5.bin
25cf81bf0da91e10e395c2a7f050f4d9083c75634c3774c1a6648dfc62102189		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50D5 4924 bytes
font_01_sfnt_off00006179.bin
ab654c1adfa8e208bd27156328126fdb414f61a1870520b8f0a8189706953bd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6179 9936 bytes
font_02_sfnt_off0000836e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x836E 4324 bytes

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