Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7fc3fc753a8e92…

MALICIOUS

PDF

43.6 KB Created: 2020-08-12 18:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d22e283cd99072d5c788dd345f1db118 SHA-1: cb5185e86528c5747138a9d5af86e099111f0fb5 SHA-256: 2a7fc3fc753a8e924a434b7caa75dbcb08f7ed2ccc07ac88c2435e744ff423ed
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=ca+final+costing+paduka+pdf'. This indicates the document's primary purpose is to lure users to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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=ca+final+costing+paduka+pdf
    • http://files.popcornpets.org/uploads/1/3/2/6/132695571/073360613e7ce6d.pdf
    • http://files.wichitafallsbridge.com/uploads/1/3/0/8/130813320/dde152f575a79f6.pdf
    • http://files.roadstercarwash.com/uploads/1/3/2/3/132303270/vusogidel-jeteto-jewaj-rovisot.pdf
    • http://files.artistsmakeupstudiodoha.com/uploads/1/3/1/4/131437487/xikoro-nokajeni-xuriguxop-keziga.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/4192560885.pdf
    • https://cdn.shopify.com/s/files/1/0434/5649/5783/files/42703578470.pdf
    • https://cdn.shopify.com/s/files/1/0433/9073/0391/files/cargoes_john_masefield.pdf
    • https://cdn.shopify.com/s/files/1/0429/5730/8063/files/pearson_health_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewowa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6222/3263/files/8436385163.pdf
    • https://cdn.shopify.com/s/files/1/0434/2412/0997/files/kivukekuxogozabironupo.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/68686739136.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/verukuxom.pdf
    • https://cdn.shopify.com/s/files/1/0430/6088/7705/files/71950448731.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_off00005152.bin
9f2011bab21eaef83edeaacfed74739c4de938ee5427c942df5cb8e007b5e72b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5152 5076 bytes
font_01_sfnt_off000062aa.bin
5753fe77b52a5b53d7db3eaa7efc7e7ca3075995382426791867f21a4561e164
pdf-font-stream PDF embedded font (sfnt) at offset 0x62AA 14860 bytes
font_02_sfnt_off00009185.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9185 4324 bytes