Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cc6f44b2cd4048…

MALICIOUS

PDF

43.8 KB Created: 2020-08-14 00:14:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d366bf86e9ab9d0718b743f27c5adfa SHA-1: 86a12cd5b3a4fcdc7100b77fbd40a8d68abd9fe6 SHA-256: 80cc6f44b2cd404890c24d17a6cd89b2b502284cc7282a54f51340208dcf90c2
152 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the heuristic PDF_MALICIOUS_REDIRECTOR_LINK specifically identifying a link to ttraff.ru, a known malicious redirector. The PDF_SEO_LINK_FARM heuristic indicates a large number of external PDF links, suggesting an attempt to distribute or obscure malicious content. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this file. The document body contains garbled text and URLs, further supporting the malicious nature.

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=bibia+be+ye+ye++free
    • http://fowevikog.pcover.studio/uploads/1/3/0/7/130776855/9461262.pdf
    • http://padowiwum.crawcainellc.com/uploads/1/3/0/8/130874085/4254f27c472ed2.pdf
    • http://lurupeke.pinheadsquilting.info/uploads/1/3/0/8/130814407/98ca52d69b58.pdf
    • http://files.institutotathagata.org/uploads/1/3/1/8/131871921/galix.pdf
    • https://cdn.shopify.com/s/files/1/0428/0582/1599/files/4041883996.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/guwosozase.pdf
    • https://cdn.shopify.com/s/files/1/0440/5306/9974/files/mario_party_7_iso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tavolotifejenirogamofiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/8288/1947/files/low_voltage_surge_arrester.pdf
    • https://cdn.shopify.com/s/files/1/0432/4294/6728/files/55516615023.pdf
    • https://cdn.shopify.com/s/files/1/0432/0110/1985/files/90882753957.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/college_physics_tenth_edition.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/75685088131.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_off000058cb.bin
9e6f7cf163f68d19bca417b94b1f4b5e9d42c8508af46136380924a7a33056bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x58CB 4336 bytes
font_01_sfnt_off0000678f.bin
f22e71189b3360ede463f58ef2d422ec4aedeecef026508cbbf0b05940908837
pdf-font-stream PDF embedded font (sfnt) at offset 0x678F 15004 bytes
font_02_sfnt_off000094c6.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x94C6 4324 bytes