Malicious PDF — malware analysis report

Static analysis result for SHA-256 b546183a9ded96c7…

MALICIOUS

PDF

39.0 KB Created: 2020-08-10 14:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 761a41a22069d268e37c5f2622b6163e SHA-1: 96de3fad4d69c0cc183f36570aa731725ff584fb SHA-256: b546183a9ded96c7ed1de97d7db0ab53f8dfd620ed6673bcb216d45597a0cda5
120 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a link farm hosted on cdn.shopify.com, designed to obscure the ultimate destination. One critical heuristic identified a direct link to a known malicious redirector at ttraff.cc, which is likely the primary malicious payload delivery mechanism. The document body text, though partially corrupted, includes the same topic as the malicious URL, suggesting a lure to entice users to click the malicious link.

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.cc/wb?keyword=anatomy%20of%20human%20bones%20pdf
    • http://files.egpsinc.org/uploads/1/3/1/4/131453943/5377135.pdf
    • http://kuwuv.lblscientific.com/uploads/1/3/0/8/130874431/4056704.pdf
    • http://files.buckinghamshirelandscapegardeners.com/uploads/1/3/0/7/130775607/4747481.pdf
    • http://dufaf.steelcityselfdefense.com/uploads/1/3/0/9/130969742/bavunakadevutu_jajokedirimeper_kefaziji.pdf
    • http://files.mariebyrdsproul.com/uploads/1/3/0/8/130813458/rorakosinur_zovakenogeno_forebizozulorod.pdf
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/nevaxebuweve.pdf
    • https://cdn.shopify.com/s/files/1/0440/4881/0149/files/gusazefadokuwepoda.pdf
    • https://cdn.shopify.com/s/files/1/0435/8668/3037/files/zuxenemawilezulad.pdf
    • https://cdn.shopify.com/s/files/1/0430/5397/3657/files/catalogue_caesar_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/24425868633.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/brady_bmp21_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9923/5228/files/82866478314.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/fatozawavomesesanexu.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3294/files/90647915151.pdf
    • https://cdn.shopify.com/s/files/1/0429/6825/2565/files/xenalutadeweku.pdf
    • https://cdn.shopify.com/s/files/1/0440/0083/7782/files/depofef.pdf
    • https://cdn.shopify.com/s/files/1/0438/7949/7896/files/congenital_heart_disease_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/gowoviziwe.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_off00005d30.bin
e6d1114c1eeb52f1b810715becde43bdfa147952d775f96e54ed5dd01e34faf6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D30 5384 bytes
font_01_sfnt_off00006f5a.bin
cf95eca6e0426ed1b4f165afa0bc364496e1471ca8a7f2c536b027e6fc162f19
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F5A 9340 bytes