Malicious PDF — malware analysis report

Static analysis result for SHA-256 871d04df2226f840…

MALICIOUS

PDF

48.6 KB Created: 2020-08-24 05:03:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2e0ec4a13d4f9aec4dd3a194d193a05 SHA-1: 56afe030700dbbd34ea48e63106d107006f212a6 SHA-256: 871d04df2226f840d906ae0fcaa1dba479df395e9cea7ece9e330725f17ac043
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a malicious site. The document also contains a large number of external PDF links, many hosted on Shopify, which is indicative of a link farm used for SEO poisoning or to obscure the final malicious destination. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=smooth+q+stabilizer+manual
    • http://files.susanscharfman.com/uploads/1/3/2/3/132303270/vikogiso-bobiwepa-mizadogosugurex.pdf
    • http://vudiramo.nervouscurtains.com/uploads/1/3/1/0/131070420/8aa68b1991d5f.pdf
    • http://files.ilenebealfoundation.org/uploads/1/3/1/4/131407802/vomezalowexon-benepulerajo-poxesuxi-tumed.pdf
    • http://files.normsphotoblog.com/uploads/1/3/0/7/130740522/5429351.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/55105082879.pdf
    • https://cdn.shopify.com/s/files/1/0436/3331/1897/files/80634194044.pdf
    • https://cdn.shopify.com/s/files/1/0431/7888/5280/files/94520162698.pdf
    • https://cdn.shopify.com/s/files/1/0434/1612/5590/files/buvaloki.pdf
    • https://cdn.shopify.com/s/files/1/0433/9302/4151/files/pebiniwijoxiwilusurax.pdf
    • https://cdn.shopify.com/s/files/1/0437/1097/2056/files/76201414615.pdf
    • https://cdn.shopify.com/s/files/1/0440/6067/2165/files/pulilamekupeniwisefuribu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/falivamoxisipifif.pdf
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/dusovolu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/pearl_necklace_meme.pdf
    • https://cdn.shopify.com/s/files/1/0454/2021/6476/files/41895350628.pdf
    • https://cdn.shopify.com/s/files/1/0463/0410/0514/files/5157406348.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_off00006b1e.bin
7cf4a60fbe875754af849cc47a8f08e0a201c44cf1ff2c7da015e66b3dd12ace
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1E 5968 bytes
font_01_sfnt_off00007f98.bin
209a8dc8cd4bf04a6450c1ce648d8bfdc5399c54c7f52293dbd286da06b20ddb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F98 5344 bytes
font_02_sfnt_off000091a7.bin
73d5c3e85efcb341cd5e005b9f97fcc0e34a4fb2bbc0d99eddd93251d56a3d51
pdf-font-stream PDF embedded font (sfnt) at offset 0x91A7 10412 bytes