Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e4b32d842b0ccf3…

MALICIOUS

PDF

42.8 KB Created: 2020-08-29 17:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 688cce16141a3882312a8191f143f32f SHA-1: b14c70e18264e87cd6fb003d764c6897e5d1b8dd SHA-256: 5e4b32d842b0ccf31507bec42426ac3d28f0949c38782d5a35bc8826d4bbeb0b
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that appears to be the primary redirect target. This suggests the PDF is designed to lure users to malicious sites through a link farm.

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=catcher+in+the+rye+summary+sparknotes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/4447/0945/files/10355015540.pdf
    • https://cdn.shopify.com/s/files/1/0461/9400/0023/files/linea_del_tiempo_historia_de_la_teoria_celular.pdf
    • https://cdn.shopify.com/s/files/1/0435/2350/6336/files/windows_command_prompt_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/narikofajekire.pdf
    • https://static.usrfiles.com/ugd/b8c837_8d9ffaeceb504c518a6638ab40a23277.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a92d4228df245729137bddd11933ccb.pdf
    • https://static.usrfiles.com/ugd/b8c837_465b0c3ebe4b43219b3f6ec87d22ccf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c2bd1ba2946422e9b18d87b97acfd0e.pdf
    • https://static.usrfiles.com/ugd/b8c837_5182941cd8684036b6e0e4b4ad047ed1.pdf
    • https://static.usrfiles.com/ugd/b8c837_611ab0e9ed0f4056b6505d083582c493.pdf
    • https://static.usrfiles.com/ugd/0d9a50_7a546251342344a9b5c5c8fd7763f34a.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_off00006bbd.bin
780469dd4a8a71d0376b0695c1536f412e3e00f983ae6707ecc0b0cb89cb18c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBD 5212 bytes
font_01_sfnt_off00007d4d.bin
c03bd6999e0ae538121c424c9c7e912a8d3500b804d06204037d2408e88f2bb5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4D 9764 bytes