Malicious PDF — malware analysis report

Static analysis result for SHA-256 dec993173b1a3d6b…

MALICIOUS

PDF

46.8 KB Created: 2020-08-09 22:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d453f0cbf468518adb4348a73b0b8400 SHA-1: 39e7ef1c708792fd4b572382266f52f04a51bdbe SHA-256: dec993173b1a3d6b28c63b95ac8f6490940536ea03dd60bb41ac357ee0d34385
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to redirect users to malicious infrastructure, disguised as a consulting agreement template. The primary malicious URL identified is https://ttraff.cc/pify?keyword=consulting+agreement+template+pdf, which is part of a known redirector. The ML classifier strongly indicated maliciousness, and the presence of numerous external PDF links further supports a malicious intent to drive traffic to potentially harmful sites.

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=consulting+agreement+template+pdf
    • http://files.prenatalcradlesupplies.com/uploads/1/3/1/4/131437531/6976242.pdf
    • http://files.hypnomads.com/uploads/1/3/1/3/131384573/badc8b2e909.pdf
    • http://files.holistichealthactivation.com/uploads/1/3/0/7/130775949/54760bc7893880a.pdf
    • http://files.naheffa.com/uploads/1/3/1/4/131453316/9475297.pdf
    • https://cdn.shopify.com/s/files/1/0437/2725/7749/files/pibekokuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/samilunudivero.pdf
    • https://cdn.shopify.com/s/files/1/0431/1157/9809/files/werasufivitabozubejobewiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/2670/1726/files/sefigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/concrete_words_examples.pdf
    • https://cdn.shopify.com/s/files/1/0439/9765/9294/files/introductory_statistics_weiss_10th_edition_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/8761/6413/files/beading_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jonamov.pdf
    • https://cdn.shopify.com/s/files/1/0437/5085/0709/files/putoxipebaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7645/files/kupawuveviberuv.pdf
    • https://cdn.shopify.com/s/files/1/0435/3287/7975/files/29397197448.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c9c.bin
99a787568c7651a99fc64c556e8a02d41cfd9a5e4f5b604f059db52dfbc935f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C9C 5268 bytes
font_01_sfnt_off00007e6f.bin
7cbb7cd0d3b5d020d8a7abe895a18bb30f271d979659bb7fc45afb33fb4541c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6F 9740 bytes
font_02_sfnt_off00009fb7.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FB7 4324 bytes

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