Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce49baa043e79f7…

MALICIOUS

PDF

50.7 KB Created: 2020-07-29 19:46:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cc6e6cff6f32aef7c29b003a5a8b8876 SHA-1: a37eb67fa6c1a18c2a380213365e05e330bff1b0 SHA-256: fce49baa043e79f75694ca6f2b28ffafc74024bdfc45226a48df8ae3f8037c19
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be related to a 'Kanchipuram map pdf' lure. The primary attack pattern involves redirecting users to malicious sites through these embedded links.

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.ru/pify?keyword=kanchipuram+map+pdf
    • http://files.eastsidepaddle.com/uploads/1/3/2/3/132302995/aebd38b238.pdf
    • http://files.therintins.com/uploads/1/3/0/7/130740458/tefeza_katovape_bawugipoduxi.pdf
    • http://files.flinthighschool.wales/uploads/1/3/1/3/131378852/010ea7a4.pdf
    • http://files.therintins.com/uploads/1/3/0/7/130740458/tefeza_katovape
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/serirevekubunodisisap.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6497/files/89801188200.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/sexurepabapisadosegovader.pdf
    • https://cdn.shopify.com/s/files/1/0431/1774/0199/files/poduromut.pdf
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/vumenojum.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0591/files/99307664260.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/5809740506.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/pevolafasanasezefapatem.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/47101637648.pdf
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/35538138864.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_off000084c3.bin
c19462e9613fc75a3d7f0c87c2c48f19e3782e1523f5ec5b50337c6b017e51de
pdf-font-stream PDF embedded font (sfnt) at offset 0x84C3 4728 bytes
font_01_sfnt_off00009493.bin
2833933203b4b4629e7422b6023cc6bddfcc22a937bbd1f42db6b5eae55293f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x9493 12840 bytes