Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf012c8cebe902b…

MALICIOUS

PDF

41.8 KB Created: 2020-07-29 15:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e0d7fc06cbf5f9f74ea547caf160023 SHA-1: a04b18548daaccd159fc644391b2fce40f679302 SHA-256: 6cf012c8cebe902b96259f0f930932927946ef19773ac2badb7eee5238bb22f1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to potentially malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure for downloading a PDF related to stock trading. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL supports 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.cc/pify?keyword=stock+trader+s+almanac+2020+pdf+free+download
    • http://files.spttechsupport.com/uploads/1/3/0/7/130775950/fosotonivi_disawok_pawokewasidipe_susarorimesifuv.pdf
    • http://files.nanaimokettlebell.ca/uploads/1/3/1/6/131606467/1ace5ede9c2fae4.pdf
    • http://files.chicanavegana.com/uploads/1/3/0/7/130738875/madibenarameloz-rozogep-vilipevanixu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/fivop.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/13372025890.pdf
    • https://cdn.shopify.com/s/files/1/0436/6640/7589/files/78835267158.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/68368340498.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85213016947.pdf
    • https://cdn.shopify.com/s/files/1/0437/3518/7605/files/porunijebupurepefuzik.pdf
    • https://cdn.shopify.com/s/files/1/0433/9168/0666/files/zatagalutopegodawavimuzi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5050/7167/files/81845605611.pdf
    • https://cdn.shopify.com/s/files/1/0435/8940/2779/files/58503514915.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/gujizubanorukopozate.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/karufinofupukujunubakoti.pdf
    • https://cdn.shopify.com/s/files/1/0428/7306/1532/files/88248568272.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/58242503161.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_off00006489.bin
68c2ea28360d94c7156e95cc0fd8c563c1105c769651f03c81a90e2d32a2cc4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 5576 bytes
font_01_sfnt_off0000776b.bin
b61e7a1575182d425e8b54ff24e9b7952413cd606a14679148ff11e7f1cf4e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x776B 10216 bytes

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