Malicious PDF — malware analysis report

Static analysis result for SHA-256 2865ba83ff6c20ac…

MALICIOUS

PDF

38.1 KB Created: 2020-08-13 19:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9590bbc456c898655da860c051706b9 SHA-1: e65035a888b4bb4654d55d84ba114ac1a2074ebe SHA-256: 2865ba83ff6c20acee6381c8029f1e9c9f142c453314e301eb6edcff10e14b04
150 Risk Score

Malware Insights

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

The PDF document is identified as malicious due to its structure, which includes a large number of external links, many pointing to Shopify domains. The primary malicious link, https://ttraff.ru/wb?keyword=cambridge%20igcse%20geography%20revision%20guide%20student's%20book%20pdf, acts as a redirector, likely leading to further malicious content. The document body, though heavily obfuscated, contains keywords related to educational materials, suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wb?keyword=cambridge%20igcse%20geography%20revision%20guide%20student
    • http://files.nicolajanephotography.com/uploads/1/3/0/7/130740213/tukoxakavusogezijuz.pdf
    • http://bapopuwim.skinboutique.shop/uploads/1/3/1/8/131871699/f8d0f46d.pdf
    • http://files.whowardwilliams.com/uploads/1/3/1/3/131380467/69b4ad4.pdf
    • http://files.just-abit-off.com/uploads/1/3/0/7/130775607/desomo.pdf
    • http://files.larayesbbqsauce.net/uploads/1/3/1/6/131606260/basazoxebisevut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41326774972.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xiguxalenagidofivixonagez.pdf
    • https://cdn.shopify.com/s/files/1/0428/8747/9455/files/xarameraliwetuturukar.pdf
    • https://cdn.shopify.com/s/files/1/0430/9667/0365/files/posusi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/rezobuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/5795/5487/files/22205849305.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/fajilojexak.pdf
    • https://cdn.shopify.com/s/files/1/0435/9618/5763/files/41527756131.pdf
    • https://cdn.shopify.com/s/files/1/0433/9066/4860/files/ketojunal.pdf
    • https://cdn.shopify.com/s/files/1/0434/1468/3813/files/wubina.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/56215165423.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046f2.bin
89363e3445b46fa5424d9b12df06cd32e99a6a95d0b8f54959e1316047a6772f
pdf-font-stream PDF embedded font (sfnt) at offset 0x46F2 5844 bytes
font_01_sfnt_off00005ac4.bin
5dc14204f46cd36666844b9acb828a952f5638b34d7e913815e3c07caa1775e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC4 10116 bytes
font_02_sfnt_off00007d06.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D06 4324 bytes