Malicious PDF — malware analysis report

Static analysis result for SHA-256 45aed7c1b20d97be…

MALICIOUS

PDF

44.7 KB Created: 2020-08-25 14:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd7b37aef0271dc159951e287cbd0793 SHA-1: bd72983ee2ddd494fd8ff0f4190b8b810f407826 SHA-256: 45aed7c1b20d97bebeca45e9a41870433433d743d65725a81b5c01b93920c304
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a prominent link to a malicious redirector, disguised with a lure related to a flight simulator mod. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this link points to known malicious infrastructure. The PDF also contains a large number of external links, identified by PDF_SEO_LINK_FARM, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, but the primary attack vector is the malicious URL embedded within the document.

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=flight+simulator+2019+flywings+mod+apk
    • http://files.charlestoncounselingportal.com/uploads/1/3/1/6/131636781/2401126.pdf
    • http://lonusorug.rainshadowdrents.com/uploads/1/3/1/3/131398101/8372461.pdf
    • http://fizaluwib.davistennisacademy.com/uploads/1/3/2/7/132740890/1428797.pdf
    • http://files.steamengineokc.org/uploads/1/3/1/3/131381681/9fd2598cbbb31e.pdf
    • https://cdn.shopify.com/s/files/1/0440/1928/6174/files/75369052511.pdf
    • https://cdn.shopify.com/s/files/1/0438/6009/9222/files/agritourism_business_plan.pdf
    • https://cdn.shopify.com/s/files/1/0432/7525/5972/files/27190559948.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/como_inserir_assinatura_digital.pdf
    • https://cdn.shopify.com/s/files/1/0435/2360/4631/files/vinamukalamumirusuje.pdf
    • https://cdn.shopify.com/s/files/1/0437/2725/7749/files/nubularimeziwu.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/batuwop.pdf
    • https://cdn.shopify.com/s/files/1/0439/2163/7544/files/sudden_strike_4_game_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/30914642050.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/60801944673.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/nekibegig.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dc8.bin
6f236b4f1a06d95834661ac71dd29a22b244d0837db90e3f656cf079c7676b42
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC8 6148 bytes
font_01_sfnt_off000082ad.bin
22cd59a60365361bbf288c03d11099e4208f1d18c18cac0884a235532f0b9970
pdf-font-stream PDF embedded font (sfnt) at offset 0x82AD 10128 bytes