Malicious PDF — malware analysis report

Static analysis result for SHA-256 904de8a1575f6dbd…

MALICIOUS

PDF

59.2 KB Created: 2020-08-05 17:30:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d2addc856a5d006431c9c0dd1f75da5b SHA-1: 18d653d767c96d44f1b9322d42901df4555e9802 SHA-256: 904de8a1575f6dbdc3637e6c5f1ad1635f56a588fd38662b325b9b58634f69ad
128 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious domain (ttraff.cc). This suggests a link farm or redirection tactic to obscure the final malicious destination. The presence of a 'download button' heuristic further supports the lure-based attack pattern. The document body, though heavily obfuscated, contains the suspicious URL, reinforcing the redirection attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=simple+past+tense+story+exercises+pdf
    • http://files.db-trends.com/uploads/1/3/0/8/130874317/a5d939743657f.pdf
    • http://files.tlkventures.com/uploads/1/3/1/4/131409309/abad310af.pdf
    • http://rowati.elevatecommunitychurch.com/uploads/1/3/1/4/131482952/715137ad10f.pdf
    • http://files.paulsvalleyartscouncil.org/uploads/1/3/1/6/131607163/sonobixiliregijub.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93515438816.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/jusuponemomi.pdf
    • https://cdn.shopify.com/s/files/1/0427/9956/2911/files/xosenafiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5570/9351/files/tony_little_gazelle.pdf
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/90528588216.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3904/files/gapuvuvekivugubomenakirod.pdf
    • https://cdn.shopify.com/s/files/1/0432/6975/0940/files/git_merge_squash.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/pupiwisigojelumofexog.pdf
    • https://cdn.shopify.com/s/files/1/0431/2009/9488/files/sosanabibo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/tavapu.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_off0000aa22.bin
f83967fca3a5b35e5198207b15296405c10672ce563e0e6ed0da8a6f9994a8c3
pdf-font-stream PDF embedded font (sfnt) at offset 0xAA22 5572 bytes
font_01_sfnt_off0000bd08.bin
18909f84f15e3b428c0be367911045ebf48af91e5dae7adae760359c00d84ad5
pdf-font-stream PDF embedded font (sfnt) at offset 0xBD08 10260 bytes