Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a439d7bae32364d…

MALICIOUS

PDF

43.1 KB Created: 2020-08-13 04:45:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6210abd488ca6934b7c08b3d90fd6f6b SHA-1: bedff9fbd61a67b7c96eb52b6965bc08332e070c SHA-256: 7a439d7bae32364dd4b29877b99e330f62cdf7962c8612b86a7f2fba56682101
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links, one of which, 'https://ttraff.com/wb?keyword=flames%20of%20war%20rules%20v4%20pdf', is flagged as a malicious redirector. The document body also contains numerous URLs, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic to disguise malicious intent. The ML classifier strongly indicates maliciousness, supporting the attack pattern of luring users to malicious infrastructure.

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.com/wb?keyword=flames%20of%20war%20rules%20v4%20pdf
    • http://files.dynamicathleticcenter.com/uploads/1/3/1/3/131380934/c5656.pdf
    • http://zaxanagi.nakekela.co.za/uploads/1/3/1/8/131856372/1516928.pdf
    • http://minapobuf.kgoetztraining.com/uploads/1/3/1/4/131438175/ac7cb8.pdf
    • http://files.iamsimonyee.com/uploads/1/3/1/4/131438441/7208672.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/3747/2421/files/fuselukoka.pdf
    • https://cdn.shopify.com/s/files/1/0440/8039/8486/files/10999636355.pdf
    • https://cdn.shopify.com/s/files/1/0431/2943/8370/files/75737597467.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0826/files/kissmanga_one_piece.pdf
    • https://cdn.shopify.com/s/files/1/0431/8812/5857/files/nopipuzizis.pdf
    • https://cdn.shopify.com/s/files/1/0431/1423/4013/files/nstm_555_revision_13.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/what_is_sharepoint_browser_plugin.pdf
    • https://cdn.shopify.com/s/files/1/0433/5383/3637/files/ravunobabodu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4014/4534/files/7470351576.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/28462504026.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/pubomuwobejunaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/human_psychology_101_free_download.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_off00006bdc.bin
135c4fc090b5a4a07039f5fd7708aaff4f6d4300639e6b63dacf26227876dc6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDC 5380 bytes
font_01_sfnt_off00007e37.bin
cd8d228fdb3d3dc2c4a79b31c3746ff4d13a53a890dde4c4744e0b29773d6274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E37 9756 bytes

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