Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e928859beebca28…

MALICIOUS

PDF

45.0 KB Created: 2020-08-30 17:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 279726420cd860a79d67e9e6f7189d99 SHA-1: 00cb8eeb54c16b5e299f77317a82c5816f374e06 SHA-256: 8e928859beebca282fa20b5928ce2c81ad95813d31eae1dd069061f5c6ea5980
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes text related to a 'New holland 268 baler parts manual' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a large number of external PDF links further indicates a link farm or SEO poisoning tactic.

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.ru/wix?keyword=new+holland+268+baler+parts+manual
    • https://static.usrfiles.com/ugd/e745be_7ed4f22435ea48efb7f97acd2354b1d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d8e8d6012ea549288043a7e5f2d85829.pdf
    • https://static.usrfiles.com/ugd/b8c837_3a8b07f1bdc742179441e9bc251b0cc7.pdf
    • https://static.usrfiles.com/ugd/fd3290_a951ab0320054b5a9ed60fc13eacc226.pdf
    • https://static.usrfiles.com/ugd/b8c837_61cac3feeb7743d2911af8ce56d9667b.pdf
    • https://static.usrfiles.com/ugd/b8c837_00dd6d23b30d4a7fa91d0b87e0244c30.pdf
    • https://static.usrfiles.com/ugd/12f4eb_ed4d7250273141238e2cff63a6417a5b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fdf5570ff97428e8f0351ceb8941f62.pdf
    • https://static.usrfiles.com/ugd/b8c837_019bf0379c7b4e1faca1db5e2cfd3c5d.pdf
    • https://cdn.shopify.com/s/files/1/0440/0503/2086/files/piruxabewagufowemunadeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/7699/3702/files/photoshop_trial_reset.pdf
    • https://cdn.shopify.com/s/files/1/0437/5930/4858/files/takegaravudija.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/add_and_subtract_fractions_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0436/0051/1138/files/jipofakozewe.pdf
    • https://cdn.shopify.com/s/files/1/0440/2046/5829/files/visual_studio_android_emulator_requirements.pdf
    • https://cdn.shopify.com/s/files/1/0435/7180/6366/files/cambridge_pet_1.pdf
    • https://cdn.shopify.com/s/files/1/0433/4210/2679/files/english_story_for_class_3.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_off0000622d.bin
47e0df7803772b74bf68ca95b0444e569f4ad4548d412ba58cea436bd16e9f5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x622D 5880 bytes
font_01_sfnt_off00007609.bin
be58f0ad9829c02597a0e749895687e14cd26096f204dbcdcd73c34472d374d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7609 15812 bytes

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