Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca7df0a688f9115…

MALICIOUS

PDF

46.4 KB Created: 2020-08-12 10:40:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a69f5afd2e08d7b7134acefcde8e529d SHA-1: 76f8b144eb0baf01072da790845c054bbbd70275 SHA-256: 8ca7df0a688f9115a424537a91dbbbaec3111adc2df9f47964b2db100e468cae
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at 'ttraff.cc'. This suggests a link farm or SEO poisoning technique used to distribute malicious content. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains the target URL, reinforcing the malicious intent.

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/pify?keyword=aircraft+structural+analysis+howard+curtis+pdf
    • http://files.sosalliance.org/uploads/1/3/2/6/132695408/podudog_kofakame_gaporiwepojov.pdf
    • http://bujosa.manchestergate.net/uploads/1/3/1/4/131438641/vodopimi.pdf
    • http://files.7thbattalion13thartillery.com/uploads/1/3/0/7/130775992/bf2220e.pdf
    • https://cdn.shopify.com/s/files/1/0431/6119/0554/files/sajenobos.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/administrative_law_agpalo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/anticonvulsivantes_mecanismo_de_ao.pdf
    • https://cdn.shopify.com/s/files/1/0436/7689/3334/files/gist_family_catering.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/bamobi.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/55019470366.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/operate_personal_computer.pdf
    • https://cdn.shopify.com/s/files/1/0435/0250/2048/files/fovubixaretotur.pdf
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/80784696324.pdf
    • https://cdn.shopify.com/s/files/1/0429/3863/0300/files/bss138_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/1610/9736/files/wegitakiveruzebibiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/kudutamigepidet.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/56340297187.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_off00006927.bin
517e74cea5eb0111ea62d691bbdf29b290e5c997cd58a751c42329fe2f4f7417
pdf-font-stream PDF embedded font (sfnt) at offset 0x6927 5188 bytes
font_01_sfnt_off00007aca.bin
6eb96fa3ed65365c54975d0d96a4cc55b3426003f9dbcaaf6ca91e16ca075688
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACA 10404 bytes
font_02_sfnt_off00009e4e.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9E4E 4324 bytes