Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c24beb31dcd9e1a…

MALICIOUS

PDF

54.9 KB Created: 2020-08-07 13:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2487095a54aae020a82181035a4fb8c SHA-1: 3cb731609e7f62bffafc8a8f3aef89df8ab7a106 SHA-256: 6c24beb31dcd9e1a2863b02e4c32e20b156211bc8aefe78f1510bdece42ba80f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The presence of numerous other PDF links, many pointing to Shopify, indicates a link farm strategy, likely for SEO poisoning or to obscure the final malicious destination.

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=oh+hell+card+game+rules+pdf
    • http://files.huntersvillelawyer.com/uploads/1/3/1/4/131454523/5274edf52dac71.pdf
    • http://files.cienaraenelson.com/uploads/1/3/2/6/132682204/42036d41.pdf
    • http://kuvogoxub.nccftw.org/uploads/1/3/2/7/132712207/67b924962.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8905/8206/files/tomb_of_annihilation_magic_items.pdf
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/49326806747.pdf
    • https://cdn.shopify.com/s/files/1/0431/7695/1974/files/nadagorifofelezelopomiwev.pdf
    • https://cdn.shopify.com/s/files/1/0429/2119/7724/files/nijuzoropujonez.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8568/files/linolapizuzewet.pdf
    • https://cdn.shopify.com/s/files/1/0431/7357/6865/files/98174000064.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/denon_avr_x1500h_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0956/files/33030343376.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/33504122857.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xizujebekox.pdf
    • https://cdn.shopify.com/s/files/1/0433/0949/8536/files/pipojugiwemurikewe.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/kamafulinuwimidar.pdf
    • https://cdn.shopify.com/s/files/1/0431/7354/4093/files/95231305913.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_off0000988c.bin
865411328dbf405eb350901b621c84eec66cac78a79e2acb21f8b7a620a21f90
pdf-font-stream PDF embedded font (sfnt) at offset 0x988C 5596 bytes
font_01_sfnt_off0000ab68.bin
c82ec1c17ddb4998f8d5775cec8297fb838d53b9e97618852e8481259e6440bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB68 10416 bytes