Malicious PDF — malware analysis report

Static analysis result for SHA-256 4252f1fcff48b08c…

MALICIOUS

PDF

38.5 KB Created: 2020-08-11 06:21:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43989c69b552dc016b1abb559dd14658 SHA-1: 09851fbe45279b03fc8f5993288dd67258bcc34d SHA-256: 4252f1fcff48b08c3f8877621e3474323f96ce9bec3a7a2797d2d31e7fe5aa3e
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.ru). The document body, though heavily obfuscated, contains the text "Jazz ukulele tabs pdf" and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous links indicates a link farm SEO tactic, likely to obscure the malicious redirector. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=jazz+ukulele+tabs+pdf
    • http://files.bluehorizonmassage.com/uploads/1/3/1/8/131871864/bozemuvisexis.pdf
    • http://files.stevesquires.org/uploads/1/3/0/9/130969714/tiviji.pdf
    • http://files.ajgatespro.co.nz/uploads/1/3/2/6/132681452/172075f338.pdf
    • https://cdn.shopify.com/s/files/1/0428/9665/4489/files/rasugigigedizoxogibi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1116/8663/files/laruzebujikakitozosofal.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/xumufezijufuga.pdf
    • https://cdn.shopify.com/s/files/1/0438/5737/9488/files/81004487185.pdf
    • https://cdn.shopify.com/s/files/1/0438/2153/1293/files/32534707018.pdf
    • https://cdn.shopify.com/s/files/1/0430/9660/4825/files/mavevuwog.pdf
    • https://cdn.shopify.com/s/files/1/0433/9017/3349/files/workpro_quantum_9000_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/1547/8176/files/xolazotitadut.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/6670346874.pdf
    • https://cdn.shopify.com/s/files/1/0427/4126/8647/files/lofurekozipurojekap.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/7950148495.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/modle_d_attestation_de_travail.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/shakin_all_over_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/79490298846.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_off00005916.bin
fe5f2a109215157110f4cc8ab733b60a0161b8c2b04ce1976747142f9aeaf8fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x5916 5180 bytes
font_01_sfnt_off00006acd.bin
670d306bc58194bb5534f4ad81f17f00230cea7b332ebfb7e2f1889abd2cf3ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACD 10060 bytes