Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae5118c91ea42ff…

MALICIOUS

PDF

118.8 KB Created: 2020-08-10 08:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a31fecc854f0168daee015a74e3335ab SHA-1: e7bdfd1a7674ee0412fefb47ae0f58499fa99137 SHA-256: cae5118c91ea42ffd5d8862c8d08d1e0457eae01adb5f800f7b8cde5527cfe74
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented to the user in the document body, disguised as a link to 'Adventures of Tintin comics pdf'. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious.

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=adventures+of+tintin+comics+pdf
    • http://files.nileswesttheatre.com/uploads/1/3/2/7/132712415/maber_balan_mumebabi_zazot.pdf
    • http://files.saranicole2612.com/uploads/1/3/0/8/130814057/poreb_gumerixaziresaj_wanevumitefar_lojitopatawi.pdf
    • http://files.ridgewaywilts.com/uploads/1/3/1/3/131379054/numutexukisosin_kelubifexeg_zomofeja_bamitarenigeni.pdf
    • http://files.mrsrussellsclassroom2018.com/uploads/1/3/0/7/130739456/8273433.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/28772493420.pdf
    • https://cdn.shopify.com/s/files/1/0438/0144/4514/files/gefunomulufovexogugi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5596/4569/files/27469245910.pdf
    • https://cdn.shopify.com/s/files/1/0433/9056/6556/files/feet_to_meter_conversion.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/18609220972.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rinajimakonewob.pdf
    • https://cdn.shopify.com/s/files/1/0430/6436/1113/files/sanefojosoxig.pdf
    • https://cdn.shopify.com/s/files/1/0440/4012/6629/files/40515681722.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2484/files/37868211215.pdf
    • https://cdn.shopify.com/s/files/1/0430/0580/4698/files/niwelufuzu.pdf
    • https://cdn.shopify.com/s/files/1/0434/9244/2277/files/o_reilly_web_scraping_with_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/5374/4279/files/41141552778.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_off00018186.bin
0f2092e3bc53ddb2ad84ba3b3d4d5b267f87fe75f4d7113e9556f7847cb9541a
pdf-font-stream PDF embedded font (sfnt) at offset 0x18186 5108 bytes
font_01_sfnt_off000192e3.bin
f7cdc0ccf5ef590bfce94d5e3a48c27749ff93b3f1ac42c2aa5aa83476b99b9c
pdf-font-stream PDF embedded font (sfnt) at offset 0x192E3 11028 bytes
font_02_sfnt_off0001b861.bin
d98a9309e076b13835c6659d635ae6c9662cc733e578b44ec6f104cfef2f50ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B861 16100 bytes