Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cbf852c7422a0f1…

MALICIOUS

PDF

62.7 KB Created: 2020-08-08 05:35:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0d0afaea02fc3ad0c08b8411ab5bd00 SHA-1: 558d425c331c4e5a99b9b91b30568d64dd29ba55 SHA-256: 3cbf852c7422a0f13af93edaa9da6c57adccf810521906978f08fa492a1e27ef
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link that points to 'ttraff.cc', a known malicious domain. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to trick users into clicking it. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm or SEO manipulation tactic to distribute the malicious content.

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=approaches+to+educational+management+pdf
    • http://files.teaspoonsofgrace.com/uploads/1/3/1/6/131606368/mekogolesoluputur.pdf
    • http://files.shepherdhills.org/uploads/1/3/0/7/130775102/b8e2fb28b1.pdf
    • http://files.quinta-milhafre.com/uploads/1/3/1/6/131637374/wafenifomimukikaro.pdf
    • https://cdn.shopify.com/s/files/1/0431/5892/9570/files/fixanitanekudexabe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9028/8535/files/fezidafibulejike.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/75455759266.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/84391294050.pdf
    • https://cdn.shopify.com/s/files/1/0430/3749/1354/files/lemof.pdf
    • https://cdn.shopify.com/s/files/1/0427/5293/4044/files/27026060403.pdf
    • https://cdn.shopify.com/s/files/1/0433/8375/0814/files/somaluwasokasixamezez.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3257/files/1733043538.pdf
    • https://cdn.shopify.com/s/files/1/0438/2726/5693/files/rukoxizezoruwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/benti_chaupai_sahib.pdf
    • https://cdn.shopify.com/s/files/1/0428/8780/7129/files/59813688182.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/fedex_shipment_release_authorization.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_off0000b832.bin
2aa661fc64d13ad9efc9d2a5ed1f02b6ffc50bb8497e888fb5c65c4858b90a23
pdf-font-stream PDF embedded font (sfnt) at offset 0xB832 5556 bytes
font_01_sfnt_off0000caec.bin
2c6a54d622dcd389e81f9669429b3b570577268fbf58ba3a4afdb13332a1ca4c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAEC 10104 bytes