Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1099685aa0beb96…

MALICIOUS

PDF

45.3 KB Created: 2020-08-23 05:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ff523018d5a36a006fa4bae17a7db8d SHA-1: 14660bc2e3cf8a4330ee1c55ca1a8d930c820051 SHA-256: c1099685aa0beb968eab2d0d3623fc492c22ea5415383c0d51fd0b23ef384556
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one pointing to a known malicious redirector (ttraff.com). The ML classifier strongly indicates maliciousness. The document body is heavily obfuscated, but the presence of multiple links suggests a phishing or redirection attempt to deliver further malicious content. The heuristic PDF_SEO_LINK_FARM indicates a mass external PDF link farm, further supporting the redirection attack pattern.

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.com/pify?keyword=a+proposito+di+elsie+pdf
    • http://gapulaz.mollystreasuretrove.com/uploads/1/3/1/4/131482975/9163be23.pdf
    • http://dawid.leonardcarney.com/uploads/1/3/0/8/130814030/joluwuf.pdf
    • http://mikos.midnight-farm.org/uploads/1/3/1/3/131380005/7726636.pdf
    • https://cdn.shopify.com/s/files/1/0457/6487/0300/files/put_ipad_into_guided_access_mode.pdf
    • https://cdn.shopify.com/s/files/1/0428/9275/5111/files/paxovezabidodetugop.pdf
    • https://cdn.shopify.com/s/files/1/0433/6628/5464/files/budgeting_and_forecasting.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/binugaxaje.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/17320267978.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/21052195886.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0040/files/raburutuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2011/4331/files/microsoft_excel_check_register_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/8126/9401/files/jobcentre_plus_travel_discount_card_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/9464/7719/files/white_transparent_background_color_code_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/5300/6494/files/64743316162.pdf
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/dezitexezam.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_off000065f8.bin
c0e1c9bea9d7fe93e907a57b1dac838ce198cc10aee19f40c653faeed223152d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F8 4496 bytes
font_01_sfnt_off0000754e.bin
745f72b5feaba7baccbfcf7d5e43f609b2d96e3fbe490412c93db59cca471f26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754E 11012 bytes
font_02_sfnt_off000098fc.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98FC 4324 bytes

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