Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c4af26d68e7c87…

MALICIOUS

PDF

50.2 KB Created: 2020-08-31 10:49:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2208fc47d020bbfbea4ad855fee2944d SHA-1: 86607a0acb496fdc67e426d49467f6deda4b6433 SHA-256: f6c4af26d68e7c87526a4d53d46f0e1ef43d23c94885c142e299ac77d25cc4c6
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to Shopify domains, likely for SEO poisoning. The primary malicious IOC is the redirector URL: https://ttraff.me/wix?keyword=apprendre+l%2527+automatisme+industriel. This URL is flagged as malicious and likely serves as a lure to a phishing or malware distribution site. The document body itself is heavily obfuscated and contains embedded URLs, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.me/wix?keyword=apprendre+l%2527+automatisme+industriel
    • https://cdn.shopify.com/s/files/1/0438/6629/2389/files/50334909474.pdf
    • https://cdn.shopify.com/s/files/1/0431/2511/2988/files/91495556564.pdf
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/risemajotazuges.pdf
    • https://cdn.shopify.com/s/files/1/0434/9109/8790/files/81082617455.pdf
    • https://cdn.shopify.com/s/files/1/0427/6885/9303/files/drawing_of_snowflakes.pdf
    • https://cdn.shopify.com/s/files/1/0436/5529/9237/files/ccna_200_301_book_download.pdf
    • https://static.usrfiles.com/ugd/c1615c_779756de985a4a7faadbb1ddea97e674.pdf
    • https://static.usrfiles.com/ugd/73cb9e_a9055221429b42589b455f645f68f557.pdf
    • https://static.usrfiles.com/ugd/2f07a1_16de90c86e0f4c63ac9b47602b06a28c.pdf
    • https://static.usrfiles.com/ugd/8127dd_2c0dae8b70084a128bfca392940babeb.pdf
    • https://cdn.shopify.com/s/files/1/0438/5020/3296/files/dovuwamivivazikaxa.pdf
    • https://cdn.shopify.com/s/files/1/0434/1504/4254/files/zizuridezabofomomewur.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/world_history_book_file.pdf
    • https://cdn.shopify.com/s/files/1/0435/6908/6623/files/zoxamaponazesuwekin.pdf
    • https://cdn.shopify.com/s/files/1/0430/5498/9466/files/romavojugarurovijopekenu.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_off0000829f.bin
5baff89e0e11b2b874d4b599f10bc65ff9c5d87d1e4b24c1bdd24737d1a0742b
pdf-font-stream PDF embedded font (sfnt) at offset 0x829F 5128 bytes
font_01_sfnt_off000093f4.bin
d635bfde80561e9ac390e3746b246c8e58479ccf8cfc0cd6f97978a9dc713139
pdf-font-stream PDF embedded font (sfnt) at offset 0x93F4 12140 bytes