Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c0a075350bb8bae…

MALICIOUS

PDF

117.3 KB Created: 2020-08-18 23:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1074141c1e9d0af57bbf3d943743d1c1 SHA-1: f94b19df72b4fed1139f39d35bcc3484fdd1bcea SHA-256: 7c0a075350bb8bae0884e8d197b268ec37f01206e6eb405d731ae58d820633f5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious content. The PDF also contains a large number of links to other PDFs, suggesting a link farm or SEO poisoning attempt. The ML classifier strongly indicates maliciousness, and the embedded URL heuristic confirms the presence of a link within the document.

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=anansi+trickster+tales+pdf
    • http://files.visualeyeslove.com/uploads/1/3/1/0/131069915/52fab.pdf
    • http://files.sarahpowellyoga.co.uk/uploads/1/3/0/7/130775470/virudewadegozezewel.pdf
    • http://files.foxtalesfiji.com/uploads/1/3/1/6/131636808/jolovoz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4607/4525/files/fontanela_bregmatica.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/46801935027.pdf
    • https://cdn.shopify.com/s/files/1/0434/7707/4077/files/list_of_conjunctions_and_their_uses.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/fire_risk_assessment_guides.pdf
    • https://cdn.shopify.com/s/files/1/0431/3622/1341/files/zuzewisidegaxodununopabid.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1607/files/rikibuletonuwen.pdf
    • https://cdn.shopify.com/s/files/1/0449/5143/7480/files/oracle_administration_workshop_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4499/files/51769000833.pdf
    • https://cdn.shopify.com/s/files/1/0437/3004/3041/files/sharper_image_dx-_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/4449/3720/files/git_branch_set_upstream_to.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001906a.bin
2f06470282039cd5b235403d9049a8ff195b8e65cd695eb494fc01839e810475
pdf-font-stream PDF embedded font (sfnt) at offset 0x1906A 5200 bytes
font_01_sfnt_off0001a222.bin
ce48a71f919edc0e35867e90169d702435cf85420ec6315427e6ca0a12cf8eb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A222 11172 bytes