Malicious PDF — malware analysis report

Static analysis result for SHA-256 af23af10b2f91d71…

MALICIOUS

PDF

62.1 KB Created: 2020-08-21 04:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51fd06cd7d635069d0c4ea3bb96bfc9e SHA-1: af0b47537d27d74b975f0ffd7401c8ed8ea0b48a SHA-256: af23af10b2f91d7166adec5c4d3bb4cbc93dbd693f82ccb19b3d0d2497280741
120 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, including a known malicious redirector at 'ttraff.ru'. The document body and heuristics indicate a link farm strategy, likely to drive traffic to malicious sites under the guise of SEO-related content. No scripts were extracted, but the primary attack vector is the embedded malicious links.

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=search+engine+optimisation+pdf
    • http://files.thoughtfulduck.com/uploads/1/3/0/8/130873794/86035772c0cc.pdf
    • http://titawojon.goplacesseefaces.com/uploads/1/3/1/6/131606490/4d8adeb60f.pdf
    • http://dabop.nahuatl-aztec.com/uploads/1/3/2/8/132814930/bb0102.pdf
    • https://cdn.shopify.com/s/files/1/0430/5967/5293/files/rudefizuviwofu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6635/0998/files/nosojulixupusipas.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/47198142729.pdf
    • https://cdn.shopify.com/s/files/1/0430/4912/3993/files/dragon_quest_martial_artist.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/921557615.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/97914587784.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/90686770627.pdf
    • https://cdn.shopify.com/s/files/1/0434/1841/9349/files/99029385467.pdf
    • https://cdn.shopify.com/s/files/1/0433/4993/4231/files/atoms_ions_and_isotopes_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/5874/8837/files/80685451642.pdf
    • https://cdn.shopify.com/s/files/1/0435/9038/5821/files/33450072993.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_off0000b4f8.bin
a45cc6288adf954dc4d7e7dd900fc776f743ac845fe8229e462402ee78fcdbea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F8 5640 bytes
font_01_sfnt_off0000c7f4.bin
4f9241c320e4259e017e1e821655f0377beb547689184c87f17875e9c74b691b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7F4 10452 bytes

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