Malicious PDF — malware analysis report

Static analysis result for SHA-256 67069f2ad43c6759…

MALICIOUS

PDF

37.4 KB Created: 2020-08-17 16:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c72d5ceaffa2e9f42f0ce7587ce3988a SHA-1: bb3ed8c4342b6d44285811ebce0fc48497774548 SHA-256: 67069f2ad43c67594362754963986644c889ba0765625a6bebbbd3077e8782ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful sites.

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/pify?keyword=gethsemane+lyrics+sheet+music
    • http://files.blackhillspediatrics.com/uploads/1/3/1/4/131407284/5b391e0b55.pdf
    • http://files.carolpendergrass.com/uploads/1/3/2/3/132303082/vexalemowe_guwivewerava_suneberen.pdf
    • http://gumati.angelwalk.ca/uploads/1/3/1/3/131380275/xafupafutujelalu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74251218784.pdf
    • https://cdn.shopify.com/s/files/1/0432/8462/7624/files/ruteweja.pdf
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/kumunukex.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/viluragogiduf.pdf
    • https://cdn.shopify.com/s/files/1/0437/6618/6135/files/pro_forma_adjusted_ebitda_definition.pdf
    • https://cdn.shopify.com/s/files/1/0434/2585/7703/files/psp_themes_ptf.pdf
    • https://cdn.shopify.com/s/files/1/0438/0835/8561/files/nororepesedizuwoxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/7357/5841/files/diccionario_biblico_griego_espaol_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0440/6290/0374/files/naegleria_fowleri_life_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0431/6990/6852/files/29277218522.pdf
    • https://cdn.shopify.com/s/files/1/0441/3367/9256/files/91581830457.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_off0000537f.bin
b29b6b3a7972bc16a3f25f4e5f3d5b2869646d4b672189be8ecbdc8be0b20d56
pdf-font-stream PDF embedded font (sfnt) at offset 0x537F 5172 bytes
font_01_sfnt_off000064f3.bin
f2e52c06e047a6e73314eeb89cc5caa8dd0754dc0398de9add2a185b96b2387f
pdf-font-stream PDF embedded font (sfnt) at offset 0x64F3 10600 bytes