Malicious PDF — malware analysis report

Static analysis result for SHA-256 359d1e54b6be6af3…

MALICIOUS

PDF

41.5 KB Created: 2020-08-18 19:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9be53ea0002e03c21bc35dfe1e832d4 SHA-1: b44551c6a515d9f6e104995e0eabeda65e0373c4 SHA-256: 359d1e54b6be6af36865c1f4446e084918c9171385e408ddefa3dabad3935e50
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=asus+android+tablet+factory+reset', is designed to lure users with a plausible pretext. The document also contains a large number of embedded links, many pointing to Shopify, suggesting a link farm for SEO manipulation or to host further malicious content. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=asus+android+tablet+factory+reset
    • http://botajin.foothillschristiancollege.com/uploads/1/3/1/3/131379655/lifunof_vesok_kixobe.pdf
    • http://fazol.asomsanghacanada.org/uploads/1/3/1/6/131637136/8294391.pdf
    • https://cdn.shopify.com/s/files/1/0432/1312/7835/files/2893483172.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/elementary_real_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0430/9575/2864/files/70992353154.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9483/files/nejezug.pdf
    • https://cdn.shopify.com/s/files/1/0435/0600/8216/files/15087861319.pdf
    • https://cdn.shopify.com/s/files/1/0427/7298/8071/files/25032556536.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/hipaa_authorization_to_release_medical_information.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3834/files/charmander_pumpkin_carving_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gigogew.pdf
    • https://cdn.shopify.com/s/files/1/0427/4552/8487/files/pneumatic_solenoid_valves.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_off00006493.bin
40d9ae273033c566a9a7b34cc2a744c8df9605f3fdd02c647987d0323118c168		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6493 5244 bytes
font_01_sfnt_off00007677.bin
3d272657066229d0a54ca0988d1fd5b26937cb3a5a720a29fb8fd3110d0edf16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7677 10148 bytes

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