Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff98a35c7b4a38b5…

MALICIOUS

PDF

43.2 KB Created: 2020-08-27 15:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7492976537e0d109d4206172ba626986 SHA-1: 9c2b1afe32acdb26075dc22b39c509e77838beed SHA-256: ff98a35c7b4a38b52955407800cfa82d1bc7ebf50442fc7c8e46d5212bcbb136
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=selling+with+nlp+pdf'. The document body, though partially corrupted, contains text suggesting a lure related to 'selling with nlp pdf' and references the wkhtmltopdf tool, indicating it was likely generated programmatically. The presence of numerous Shopify links, while many are benign, suggests a tactic to obscure the malicious redirector among seemingly legitimate content.

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.cc/pify?keyword=selling+with+nlp+pdf
    • http://files.nmffa.org/uploads/1/3/0/9/130969819/deniz.pdf
    • http://files.tierrasantajuniorwomens.org/uploads/1/3/1/8/131858540/tiwuzeja.pdf
    • http://files.shanehagedorn.com/uploads/1/3/0/8/130874125/miwevufunon.pdf
    • http://bunekube.emergingaging.com/uploads/1/3/0/7/130775792/1668558.pdf
    • http://gabij.bassreevesconference.com/uploads/1/3/1/3/131381612/19494ebed57bb.pdf
    • https://cdn.shopify.com/s/files/1/0434/2477/6354/files/gugev.pdf
    • https://cdn.shopify.com/s/files/1/0431/3314/1149/files/97144144638.pdf
    • https://cdn.shopify.com/s/files/1/0428/4999/2870/files/metuvofij.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97503793953.pdf
    • https://cdn.shopify.com/s/files/1/0431/0948/2658/files/37732101506.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/behavior_crisis_intervention_plans_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/9872/4769/files/multiplication_counting_principle_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/2703/8371/files/fefixirug.pdf
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/cheat_engine_apk_ml.pdf
    • https://cdn.shopify.com/s/files/1/0438/2546/3456/files/arundhati_tamil_movie_songs_free_masstamilan.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_off00006a38.bin
3556809877b73e8e28efdd383db77f401f3f5d45b9f53133164af33e6ccdca8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A38 5012 bytes
font_01_sfnt_off00007b5c.bin
f4520d74e86bae6e717c9757408b54b8c570f75873bb5c888c9942390b6b929b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 10856 bytes

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