Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e26bb3ab68ae86e…

MALICIOUS

PDF

41.9 KB Created: 2020-08-19 13:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27b704ee44cbccff243c2b1ff19f9480 SHA-1: b548ab1b5930f3f547c5abef8dd26d4de2459b44 SHA-256: 3e26bb3ab68ae86e1c2bde7aaaa4d45aa7c0f8196ba3694703d31bdaf61a7eb8
154 Risk Score

Malware Insights

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

The PDF contains a link to a redirector URL, which is a common tactic for delivering malicious content. The document body, though heavily obfuscated, contains text fragments that suggest a lure related to 'toxicwap music videos free'. The presence of numerous external links, many pointing to Shopify domains, further supports the idea of a link farm designed to obscure the ultimate destination and potentially engage in SEO manipulation for malicious purposes. The ML classifier also strongly indicated maliciousness.

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=toxicwap+music+videos++free
    • http://tazule.privatestachebeardoil.com/uploads/1/3/2/7/132740541/3925523.pdf
    • http://files.cpi-plasma.com/uploads/1/3/2/7/132712116/dikanavowakomab.pdf
    • https://cdn.shopify.com/s/files/1/0431/1053/1233/files/the_big_bang_theory_12x24.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0428/files/73086896008.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9175/files/84738444458.pdf
    • https://cdn.shopify.com/s/files/1/0438/9843/7784/files/25386700389.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/xozoragiguram.pdf
    • https://cdn.shopify.com/s/files/1/0435/2468/5975/files/camera_scanner_to_tapscanner_apk.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/jekimebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5312/9640/files/libagurefoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/2476/1510/files/ninovolad.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_off000065e0.bin
c826d177ca372246ca24b340d1465b6c5e2e31c3b0b28967ecfeb7176e74d6fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E0 5436 bytes
font_01_sfnt_off0000785f.bin
434e5880d73fbcc614d1dd33b1f6502830003eaeaa78f4fa0851698e73a17425
pdf-font-stream PDF embedded font (sfnt) at offset 0x785F 10112 bytes