Malicious PDF — malware analysis report

Static analysis result for SHA-256 31fdbb87d357de56…

MALICIOUS

PDF

32.7 KB Created: 2020-08-11 18:46:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ee86d5bb806097aab8ec99e89603138 SHA-1: 28081eff85f68813d57f5da080d991dac5860467 SHA-256: 31fdbb87d357de5629aeea51e779784dcd020fca4956f18c3ee3f9a5179faa43
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a mass external link farm, with many links pointing to PDF files hosted on Shopify. One critical heuristic indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=acetylene+sds+pdf', which is likely used to obscure the final malicious destination. The document also employs a social engineering lure, instructing the user to install a browser extension or update to view content, a common tactic for credential theft or malware installation. No scripts were extracted from this sample.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=acetylene+sds+pdf
    • http://files.designlab.edu.sg/uploads/1/3/2/8/132814147/tepagezipifinu.pdf
    • http://files.familiessharinghope.org/uploads/1/3/0/8/130873826/nozagegajitir-lovogegojazuv-leniveliv.pdf
    • http://files.sommewino.com/uploads/1/3/2/6/132680852/cfe147.pdf
    • http://pawamum.houseofplenty.se/uploads/1/3/1/0/131070161/rotevilo.pdf
    • http://files.beachcitydoula.com/uploads/1/3/0/7/130776402/7727514.pdf
    • https://cdn.shopify.com/s/files/1/0433/6097/7048/files/xudizewivixegivujuras.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/60942192743.pdf
    • https://cdn.shopify.com/s/files/1/0435/8062/0963/files/33764233046.pdf
    • https://cdn.shopify.com/s/files/1/0434/2379/3308/files/beximadisibis.pdf
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/dajejopuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4334/files/domestic_animals_list.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/53046997691.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/duzuwinikifibejawazipefiv.pdf
    • https://cdn.shopify.com/s/files/1/0429/8545/5769/files/69649502016.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/rofuweluloz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/sopafavalegigom.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/wowewob.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_off00004476.bin
8b575d6d7163870054e1953d5e9e0c16f9f7a22adb1de880df63e656ef51ff26
pdf-font-stream PDF embedded font (sfnt) at offset 0x4476 4932 bytes
font_01_sfnt_off0000555e.bin
a3190922c97b2b1686facd4ea9856280ed5498a4444a321fad6c8bbb79f4c097
pdf-font-stream PDF embedded font (sfnt) at offset 0x555E 9656 bytes