Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4cb3c85292122dc…

MALICIOUS

PDF

35.0 KB Created: 2020-08-02 08:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4820697d6eb98d392a91ef8dc38a31a4 SHA-1: cafe723c495f9bb040281fe620f0ac7a68548ff0 SHA-256: a4cb3c85292122dc77f673796111bac55ca9533a249edc667ed31db07cf02567
128 Risk Score

Malware Insights

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

The PDF file contains numerous links, a significant portion of which point to a redirector service. One such link, 'https://ttraff.cc/pify?keyword=adidas+watch+manual', is explicitly flagged as malicious. The document also contains a call-to-action phrase, suggesting an attempt to trick the user into clicking the malicious link. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential SEO link farm used for distribution.

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=adidas+watch+manual
    • http://files.eatbigshitbig.com/uploads/1/3/0/7/130739233/miruvuxe.pdf
    • http://files.cmw-bas.co.uk/uploads/1/3/1/1/131163740/3791598.pdf
    • http://files.thelemonseedboutique.com/uploads/1/3/0/7/130738714/vigegot-kabesud-minenatebemawa-gipisizowolaku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8670/8890/files/69566074941.pdf
    • https://cdn.shopify.com/s/files/1/0432/0998/2107/files/55805071316.pdf
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/16394473817.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/buwukepenarunowara.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/mazinerokiwetajimifo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1594/6911/files/wiberiwabalefinekexa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/4532385929.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/kixegiwaxuvila.pdf
    • https://cdn.shopify.com/s/files/1/0427/4972/2790/files/95230701753.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/zepededubejipu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/55522745035.pdf
    • https://cdn.shopify.com/s/files/1/0428/4976/3487/files/69293962092.pdf
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/dimewasamegijada.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_off00004b90.bin
91ffe3223182090ceefbf4ca91c996cd18dd07953459243e3f5e74aa13182a51
pdf-font-stream PDF embedded font (sfnt) at offset 0x4B90 5164 bytes
font_01_sfnt_off00005d0d.bin
5470d727199c0311c328c6d3d323d7b7a0c75b0c6781901248f9c26cb1effaa0
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0D 10632 bytes