Malicious PDF — malware analysis report

Static analysis result for SHA-256 459c7de6f71ce54c…

MALICIOUS

PDF

40.7 KB Created: 2020-08-06 14:39:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15b4acdc05a88971c0efe3a7b8bc1c5c SHA-1: b8cf49885efc42949c2fddac3465ddf313b70dcb SHA-256: 459c7de6f71ce54c2cdfee238fbef83a5a4aca254351ff9b8757cecceb2f7720
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body, though heavily obfuscated, contains text related to 'Canara bank neft application form pdf', suggesting a phishing lure. The ML classifier strongly flagged this PDF as malicious.

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=canara+bank+neft+application+form+pdf
    • http://kanax.geeveemeyer.com/uploads/1/3/1/0/131070590/1252371.pdf
    • http://files.msmerryman.com/uploads/1/3/1/4/131452840/betifogined-kevirapaxofupa-mugisutabasuna-suvidem.pdf
    • http://kajow.wellswindowsanddoors.com/uploads/1/3/1/4/131453177/637687.pdf
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/introduo_a_analise_combinatoria_plinio.pdf
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/60083868317.pdf
    • https://cdn.shopify.com/s/files/1/0428/8099/1388/files/2873611029.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3082/files/10686288994.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/fizilisoxadaxubuwurixow.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gamusuzojikifikukudubug.pdf
    • https://cdn.shopify.com/s/files/1/0432/5215/4532/files/44442728539.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/molujivesal.pdf
    • https://cdn.shopify.com/s/files/1/0440/6142/5814/files/how_to_convert_to_svg_file.pdf
    • https://cdn.shopify.com/s/files/1/0437/2742/1608/files/ferolopenatekume.pdf
    • https://cdn.shopify.com/s/files/1/0434/3404/9703/files/25645659375.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/45363699601.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/vizogekiz.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_off000060ac.bin
897744879870462b55e87ba4723bd792828c40de13bfe50bd9b33a01de64e7b6
pdf-font-stream PDF embedded font (sfnt) at offset 0x60AC 5232 bytes
font_01_sfnt_off00007266.bin
0df7a6430df3984f000014d1eea49d037607f05de84d01ebca49e2deb02804f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7266 10448 bytes