Malicious PDF — malware analysis report

Static analysis result for SHA-256 d91426aca196560b…

MALICIOUS

PDF

36.5 KB Created: 2020-08-23 20:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aeea5509775730dbf6e9897099708a99 SHA-1: 8f36fcff3b6514f9d49dc12df7ea875baf0f7eca SHA-256: d91426aca196560b58559c8d4ff7d6d5e80b1871e29af7d8666ae2ce1257dcba
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many hosted on Shopify. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=eramet+annual+report+2018', suggesting a lure to a malicious site disguised as a report. No scripts were extracted, but the presence of a malicious redirector and link farm indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=eramet+annual+report+2018
    • http://files.m.kaltydesigns.com/uploads/1/3/1/4/131438282/5388253.pdf
    • https://cdn.shopify.com/s/files/1/0430/7386/3842/files/41927228069.pdf
    • https://cdn.shopify.com/s/files/1/0433/4705/0661/files/blue_water_bridge_wait_times.pdf
    • https://cdn.shopify.com/s/files/1/0430/7917/2257/files/the_complete_dlab_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/3018/4087/files/cursive_templates_for_word.pdf
    • https://cdn.shopify.com/s/files/1/0439/2586/4603/files/chinese_english_visual_bilingual_dictionary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/cms_screening_colonoscopy_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0435/3835/0231/files/staff_attendance_management_system.pdf
    • https://cdn.shopify.com/s/files/1/0437/4895/0170/files/saxibefo.pdf
    • https://cdn.shopify.com/s/files/1/0429/2860/3295/files/mathematics_for_management_and_finance.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_off0000528a.bin
a03ddff99cc299f28582d002ab35694ab72b8e47574d47db8f52d20259a9415c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x528A 5264 bytes
font_01_sfnt_off00006454.bin
ebfe8c2224e2db0a2ff3f2b8de771edf23c19e7f22aa8063e076b936dbfb9e2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6454 9804 bytes

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