Malicious PDF — malware analysis report

Static analysis result for SHA-256 8593dcf6b4d42644…

MALICIOUS

PDF

43.3 KB Created: 2020-08-10 10:33:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d8ee018459cbb929d97c7eb7ec8502a SHA-1: c09e5d7de05b4ec8c3e473d9f8bc9491096412b0 SHA-256: 8593dcf6b4d42644025bed9b13e9ce2d98af2adf4bcfb3b8cee7b06c85c90d57
120 Risk Score

Malware Insights

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

The PDF file contains numerous links, a common tactic for SEO spam or phishing. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=north+west+construction+hub+pdf'. The document body, though heavily obfuscated, contains references to 'north west construction hub pdf' and the tool 'wkhtmltopdf', suggesting a lure to disguise the malicious intent. The presence of multiple embedded links, including one to a potentially benign Shopify URL, indicates a link farm or redirection strategy.

Heuristics 3

  • 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.
  • 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=north+west+construction+hub+pdf
    • http://files.myoptique2020.com/uploads/1/3/2/6/132695741/zudug.pdf
    • http://files.implicitbiascleanse.com/uploads/1/3/1/4/131406841/vamematonepod.pdf
    • http://files.threemendousfilms.com/uploads/1/3/1/8/131857679/fodotife-resot-kegizopanujufir-dezifoxagiz.pdf
    • http://files.catch90.com/uploads/1/3/0/8/130873769/9814833.pdf
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/bluestacks_ad_skipper.pdf
    • https://cdn.shopify.com/s/files/1/0439/7652/3934/files/12887183629.pdf
    • https://cdn.shopify.com/s/files/1/0437/4413/3281/files/36170969254.pdf
    • https://cdn.shopify.com/s/files/1/0437/1467/4841/files/bluedio_t2_turbine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/neditokovowiturusumumese.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46391305542.pdf
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/32433121922.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5989/files/bayesian_reasoning_and_machine_learning_barber.pdf
    • https://cdn.shopify.com/s/files/1/0428/9468/8419/files/administrative_law_in_nigeria_noun.pdf
    • https://cdn.shopify.com/s/files/1/0429/5865/1545/files/43194244258.pdf
    • https://cdn.shopify.com/s/files/1/0437/0153/4875/files/59167574377.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c61.bin
b59ad90814040ccbe1cde5b64d521fecefa6cb104bb28a7c4aaaa99d070d2f7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C61 5200 bytes
font_01_sfnt_off00007e23.bin
f7c0bda65a6e943b11bed941fba9791f1221ab27e1d4c361c8e7350ad763a5fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E23 9992 bytes

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