Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7a071a6f6c48aaa…

MALICIOUS

PDF

38.7 KB Created: 2020-08-20 13:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eed429fae39395789aa8c4c7e85bc72b SHA-1: eea3f302ba551808033dfae390229cd772160ec3 SHA-256: b7a071a6f6c48aaaa82f59eaa63fdc6df4cb7babb1a0b26c3ac6d5a2ec00bc35
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for 'Minions movie mp4 in tamil'. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on Shopify, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ML_NYX_PDF_MALICIOUS classifier strongly indicates malicious intent.

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=minions+movie++mp4+in+tamil
    • http://rulog.deeindervoorbij.nl/uploads/1/3/0/8/130874359/2500244.pdf
    • http://zewewej.tribalnationsmaps.com/uploads/1/3/1/3/131384495/dutegakelafezu_tedipu.pdf
    • https://cdn.shopify.com/s/files/1/0440/4350/1733/files/42294375894.pdf
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/negociacion_en_el_ambito_laboral.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8072/files/47102191122.pdf
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/96572880360.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/wojajopab.pdf
    • https://cdn.shopify.com/s/files/1/0437/8470/0055/files/kilela.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/figarawevig.pdf
    • https://cdn.shopify.com/s/files/1/0432/7964/6878/files/ribagegisozoxexigojamu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9503/8877/files/neberuvopurinanikidejeke.pdf
    • https://cdn.shopify.com/s/files/1/0429/2742/3651/files/34750745017.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c8c.bin
f5f3baa984d1313cfd59f5cc0a37ca0850e5b79789bed628a12e9ee1d9009d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C8C 4808 bytes
font_01_sfnt_off00005cd5.bin
b4b8303226c2d66df21b08dd5907770bdc0a1dc6875a774207e2cedac55d36f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD5 10420 bytes
font_02_sfnt_off00008046.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8046 4324 bytes