Malicious PDF — malware analysis report

Static analysis result for SHA-256 d85ff8c7d60343d3…

MALICIOUS

PDF

44.4 KB Created: 2020-08-01 08:56:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 743db7c08f810b43b21953287c88bcf7 SHA-1: 6cf48e5bb9b9961f837356e00784f2f4c3595d24 SHA-256: d85ff8c7d60343d3c751952e37db220f2b208fa99c8400d86ca9b84b2436eb9e
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=alphabetize+in+google+sheets', which is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content. The presence of a large number of links, many pointing to Shopify domains, indicates a link farm strategy, likely to improve SEO for malicious content or to obscure the final destination.

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=alphabetize+in+google+sheets
    • http://files.villadelphini.com/uploads/1/3/2/7/132740965/82f88f9c.pdf
    • http://files.theflightproject.org/uploads/1/3/2/6/132682882/nefezadom.pdf
    • http://files.greenvalleyvet.net/uploads/1/3/1/3/131379312/5601719.pdf
    • http://files.mx.autumntheodorephotography.com/uploads/1/3/0/7/130776611/53e81d9673d0b.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/91533205517.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kaxoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/0265/0014/files/vefamu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4616/4897/files/kinovutukomururogizev.pdf
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/58637629782.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gubiwunezekubukezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6179/6248/files/wevako.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/buzodobowotarafox.pdf
    • https://cdn.shopify.com/s/files/1/0436/1509/2894/files/34115337158.pdf
    • https://cdn.shopify.com/s/files/1/0434/5312/0664/files/50909691146.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/gotamexoxupi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/mijadat.pdf
    • https://cdn.shopify.com/s/files/1/0429/4259/5239/files/witumedukenekobafobimava.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/calculus_3rd_edition_rogawski_free.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_off00007080.bin
f79e5a340526778e60fcc9d7118dcaf0890bc42d665e3fdafa39f0f48b465964
pdf-font-stream PDF embedded font (sfnt) at offset 0x7080 5164 bytes
font_01_sfnt_off00008215.bin
afb1a9015cdb5beb8c8b989eb4c2eaf7b6f3a2313ce7003a084603927605d1c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8215 9988 bytes