Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e5bb113b0b493b…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 11:06:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bab40872a3afa6814c15544f106c1728 SHA-1: 2c05189e945f14a5e9324af6853c20d6aca89c3e SHA-256: d8e5bb113b0b493b87121c603cab9f111c9c6f9aa7369e1035325e2db64330ce
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a 'Briggs stratton 375 service manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also flagged this PDF with high confidence.

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.cc/wix?keyword=briggs+stratton+375+service+manual
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/mazotuponiwukagunarisit.pdf
    • https://cdn.shopify.com/s/files/1/0446/7880/7705/files/massey_ferguson_245.pdf
    • https://cdn.shopify.com/s/files/1/0461/9993/1030/files/43702181459.pdf
    • https://cdn.shopify.com/s/files/1/0430/9018/2297/files/53049608121.pdf
    • https://cdn.shopify.com/s/files/1/0431/6368/0932/files/faromo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/55903005257.pdf
    • https://cdn.shopify.com/s/files/1/0457/4923/9964/files/3715656508.pdf
    • https://cdn.shopify.com/s/files/1/0437/3243/5093/files/29858219524.pdf
    • https://cdn.shopify.com/s/files/1/0432/1892/7775/files/learn_french_with_alexa.pdf
    • https://cdn.shopify.com/s/files/1/0437/1978/6645/files/pikoxakoxebin.pdf
    • https://cdn.shopify.com/s/files/1/0430/3156/0354/files/defitexodutexagevagile.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7649/files/carl_jung_aion.pdf
    • https://cdn.shopify.com/s/files/1/0432/5621/7750/files/simexagoxalabilob.pdf
    • https://cdn.shopify.com/s/files/1/0427/9356/6364/files/93827650216.pdf
    • https://cdn.shopify.com/s/files/1/0448/7141/8018/files/lujeduxos.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/85941493404.pdf
    • https://cdn.shopify.com/s/files/1/0432/7630/4544/files/acog_practice_bulletin_postpartum_hemorrhage.pdf
    • https://cdn.shopify.com/s/files/1/0430/8588/9689/files/pilonoki.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_off00006085.bin
4e026c753b0d2bd11473330279890bcc1df58c3e9c02441d616cc6f81d92ae76
pdf-font-stream PDF embedded font (sfnt) at offset 0x6085 5480 bytes
font_01_sfnt_off0000731a.bin
190a796cfbf66c4df77522ff8748b9c473b4e9595f07d96a8f7b0180fe60e6c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 10372 bytes
font_02_sfnt_off000096a6.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x96A6 4324 bytes