Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cdc5c10d752fe6a…

MALICIOUS

PDF

50.0 KB Created: 2020-08-08 18:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9535065aeb68aa69014123b3cf38bb5c SHA-1: b92c9727a938e37eccb95fd4dbdb60d012dae539 SHA-256: 8cdc5c10d752fe6a37ca99e64f7744211bf67ff213b931f954978f6aa898cb08
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains references to the redirector URL and other URLs hosted on Shopify and other domains, suggesting a link farm designed to lure users to malicious sites. The primary attack pattern involves tricking users into clicking on these links, which then lead to malicious infrastructure.

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=ukulele+strumming+patterns+pdf
    • http://jubuleper.creedmoorcivic.org/uploads/1/3/0/7/130775350/medubebewodovoma.pdf
    • http://files.smithmountainstriperclub.com/uploads/1/3/0/7/130739415/lalewuga_fifiponuti_kixujolexexaw_gebujurelilo.pdf
    • http://sebunuj.cozycabinconcerts.com/uploads/1/3/1/3/131379362/7c08613bec7588.pdf
    • https://cdn.shopify.com/s/files/1/0433/2896/2715/files/kodefubolevev.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/vugeralinavutukejiponapop.pdf
    • https://cdn.shopify.com/s/files/1/0435/9595/6386/files/86867531703.pdf
    • https://cdn.shopify.com/s/files/1/0431/3051/9716/files/94426457526.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16946396068.pdf
    • https://cdn.shopify.com/s/files/1/0440/6122/9206/files/dafuxirarufominew.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/el_catecismo_de_heidelberg_una_explicacion.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/76926219495.pdf
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/affine_and_euclidean_geometry.pdf
    • https://cdn.shopify.com/s/files/1/0435/1302/0570/files/evaluating_algebraic_expressions_worksheet_grade_8.pdf
    • https://cdn.shopify.com/s/files/1/0432/1450/4093/files/nutelosumezebepane.pdf
    • https://cdn.shopify.com/s/files/1/0447/4916/0602/files/swan_song_runescape.pdf
    • https://cdn.shopify.com/s/files/1/0439/1275/7400/files/1264686140.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_off00007909.bin
b96384ff1395bcfcabb32280807c541e0348297c9a52f08144e102ce4f8a13e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7909 5416 bytes
font_01_sfnt_off00008b63.bin
a06ccf8c240dfa01656e55c489d66ea55fe57d711e0be66ea25bdcbe2b5c5326
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B63 15412 bytes