Malicious PDF — malware analysis report

Static analysis result for SHA-256 00b343bf2ed6b421…

MALICIOUS

PDF

42.7 KB Created: 2020-08-03 15:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43f6f6006575a40310a25cedf7f77c8f SHA-1: fca0ee289075794e99f29b3aec0e2315a3dff5ce SHA-256: 00b343bf2ed6b421d44ee8662d53e1c8da9fc88eb22c41016bbc07f2e58bb7c8
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that leads to the redirector. This suggests a phishing or redirection attack aimed at leading users to malicious content.

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=architecture+firms+in+chennai+pdf
    • http://files.familyfirstinflatables.com/uploads/1/3/0/8/130874403/gurelulidog.pdf
    • http://files.circlevillewellness.com/uploads/1/3/2/7/132710661/jixob.pdf
    • http://files.twin-cs2.org/uploads/1/3/1/3/131398076/697321c.pdf
    • http://files.mystarsandstripes.com/uploads/1/3/0/7/130739590/a987f6e74b44.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9480/2581/files/waxoxafonazubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7832/8221/files/87423649613.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/43158452069.pdf
    • https://cdn.shopify.com/s/files/1/0429/6992/3740/files/numerical_analysis_timothy_sauer.pdf
    • https://cdn.shopify.com/s/files/1/0434/6006/7480/files/tojeri.pdf
    • https://cdn.shopify.com/s/files/1/0436/2154/8194/files/5136218836.pdf
    • https://cdn.shopify.com/s/files/1/0433/7808/1959/files/56401321575.pdf
    • https://cdn.shopify.com/s/files/1/0434/2048/3751/files/83962482199.pdf
    • https://cdn.shopify.com/s/files/1/0429/1556/1638/files/42788291966.pdf
    • https://cdn.shopify.com/s/files/1/0437/5104/7329/files/77681941032.pdf
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/betux.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37144816260.pdf
    • https://cdn.shopify.com/s/files/1/0433/7729/5516/files/katisagu.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_off000065fa.bin
35a866655f7b3ed336a47a4897f059a00a57f507fcd13badfc2ec8e8c9254841
pdf-font-stream PDF embedded font (sfnt) at offset 0x65FA 5352 bytes
font_01_sfnt_off00007806.bin
015f423767a57572d997a124918c3e1ec47c63825fbd15119990d6f6659cbc03
pdf-font-stream PDF embedded font (sfnt) at offset 0x7806 11796 bytes