Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f156e49b0b794f…

MALICIOUS

PDF

37.0 KB Created: 2020-08-29 03:48:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2493bf99897f37e7e794fe302b98598f SHA-1: e025d6b94dcdc70be0021275a76831fbc5b023a9 SHA-256: d1f156e49b0b794fdfba0f2230c88d43fe5c3d6805e592d6ac3c53f3a9b4f9e4
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to a harmful site. The document body, though partially garbled, includes the target URL, suggesting a lure. The presence of numerous other links to Shopify, while mostly benign, may be an attempt to blend in or mask the malicious link. No scripts were extracted, but the primary malicious behavior is the redirection via the embedded URL.

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/wix?keyword=haftan%25C4%25B1n+g%25C3%25BCnleri+ingilizcesi
    • https://cdn.shopify.com/s/files/1/0432/7967/9646/files/98051186740.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19085525902.pdf
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/13002742895.pdf
    • https://cdn.shopify.com/s/files/1/0457/7686/3398/files/tilamedore.pdf
    • https://cdn.shopify.com/s/files/1/0437/3754/6917/files/jowiwanilolenukeketon.pdf
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/56632279641.pdf
    • https://cdn.shopify.com/s/files/1/0432/8253/0472/files/employees_absenteeism.pdf
    • https://cdn.shopify.com/s/files/1/0432/1827/2417/files/lawalixofixubaxid.pdf
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/android_studio_generate_apk_name.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/grade_4_math_practice_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0462/9220/5729/files/faripenopenujerotewofito.pdf
    • https://cdn.shopify.com/s/files/1/0428/8043/4342/files/lazopuranokopafaduwanezuz.pdf
    • https://static.usrfiles.com/ugd/b8c837_b15d50d21fc74e01b4827209e2ba98de.pdf
    • https://static.usrfiles.com/ugd/b8c837_97f6b10ce3454c0db85ad522e47a3c50.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_off00005050.bin
914bb1cfbf7150ab7a8f16578c7bdff540a8406015d4fc70f9013a766489f624
pdf-font-stream PDF embedded font (sfnt) at offset 0x5050 5212 bytes
font_01_sfnt_off000061ef.bin
05724961717eeecd6d577b88fcb0a686fe2001d5a4bcd55b626600bfc1fe3b3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x61EF 11396 bytes