Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc0bc1e025975e7…

MALICIOUS

PDF

54.7 KB Created: 2020-08-12 08:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f3da398bcb1039fe92686c885a316dce SHA-1: eea295530f510a949d1dddfcf49566595ff46349 SHA-256: 8cc0bc1e025975e7ac7482d0b218cc07b9f8f479962454e79d3be6423c5b7206
152 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggered the malicious redirector heuristic, suggesting the primary purpose is to redirect the user to malicious infrastructure.

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=definition+of+andragogy+pdf
    • http://files.fortytwobooks.com/uploads/1/3/1/3/131398374/ba49261c1e.pdf
    • http://povapebew.clarygarden.org/uploads/1/3/0/7/130775085/98971b.pdf
    • http://sujiwoki.tsmseniorcenterassociation.com/uploads/1/3/0/8/130873826/kageviziv-xafoj-xifev-pakobala.pdf
    • http://files.carnivora.co/uploads/1/3/0/8/130813325/boroxuz.pdf
    • http://files.whatknotstudios.com/uploads/1/3/1/6/131606965/2460576.pdf
    • https://cdn.shopify.com/s/files/1/0447/2002/9852/files/61565820110.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/wagolin.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/66487120003.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/16540945666.pdf
    • https://cdn.shopify.com/s/files/1/0437/7106/8565/files/theistic_existentialism.pdf
    • https://cdn.shopify.com/s/files/1/0433/0517/3147/files/google_sheets_string_concat.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/95322295072.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/66700950479.pdf
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/how_to_undo_in_jupyter_notebook.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/bulletproof_diet_shopping_list.pdf
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/astm_impact_test_standard.pdf
    • https://cdn.shopify.com/s/files/1/0439/4975/2478/files/47562758483.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/pitazolojudota.pdf
    • https://cdn.shopify.com/s/files/1/0438/2451/3181/files/jeppesen_a_p_technician_general_textbook_download.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008611.bin
1d50e8103f4390f9754f87a4dc79837271b2db4f21d6e3744334ef0009f7b2ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 4888 bytes
font_01_sfnt_off000096c8.bin
f9f6b4f03fee9f50976acf974f03911a141d2497410486c732f220bb4a39fad4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C8 11540 bytes
font_02_sfnt_off0000bde6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDE6 4324 bytes

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