Malicious PDF — malware analysis report

Static analysis result for SHA-256 6614f0595d0aa399…

MALICIOUS

PDF

46.9 KB Created: 2020-08-11 02:15:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6868e78014998a37a9e87d9f36a36e66 SHA-1: 76a2e6b5c9d95279be87a79a6c5f00d602733f5f SHA-256: 6614f0595d0aa39970d4303f7f3107494caa7d4f09dbd0e2529e7821bcba210e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically `https://ttraff.cc/pify?keyword=telecom+billing+management+system+project+pdf`. It also exhibits characteristics of a link farm, embedding numerous external PDF links. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful 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=telecom+billing+management+system+project+pdf
    • http://dajulofuk.omicronsigmazeta.com/uploads/1/3/1/0/131070115/loxofegelavuj.pdf
    • http://files.papasroast.com/uploads/1/3/0/7/130775846/32c77da20eef.pdf
    • http://files.allthebiscuitsingeorgia.com/uploads/1/3/1/4/131483830/vurip_wogumav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/3567/0166/files/71668306702.pdf
    • https://cdn.shopify.com/s/files/1/0430/6288/6549/files/noes_de_administrao_geral_e_pblica_para_concursos_em.pdf
    • https://cdn.shopify.com/s/files/1/0434/2752/8861/files/fusionner_2_a4_en_1_a3.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/pemisajigovigufavesupalu.pdf
    • https://cdn.shopify.com/s/files/1/0448/3471/7858/files/zovanaxorolularopobidela.pdf
    • https://cdn.shopify.com/s/files/1/0444/1725/3542/files/logic_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/romevapiwuratup.pdf
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/16950865599.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/90878965197.pdf
    • https://cdn.shopify.com/s/files/1/0430/5548/0981/files/10798691908.pdf
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/fable_2_pc.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_off00006742.bin
3815069e36bb264374f279c41d883dcd7f7b1855170551242980ebcf64c7c431
pdf-font-stream PDF embedded font (sfnt) at offset 0x6742 5740 bytes
font_01_sfnt_off00007ab9.bin
da502369265fe8558c4faf45e76dbce2b63d04b9c8027aa424073fdc799bd034
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB9 16620 bytes