Malicious PDF — malware analysis report

Static analysis result for SHA-256 c767ab9b32ce3d98…

MALICIOUS

PDF

44.4 KB Created: 2020-08-14 20:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a04c133968dd1aeaf60195008c3cf720 SHA-1: 2bf0ee6ecd5ea310538024f0f23c31570184fdc6 SHA-256: c767ab9b32ce3d98b68cebdab6b1fbb118ab5e558bbf39c07909601439422dfb
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on Shopify. The document body, though partially corrupted, contains the malicious URL and references to 'Vimeo er telegram bot', suggesting a social engineering lure. 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=vimeo+er+telegram+bot
    • http://files.boundlessyogastudio.com/uploads/1/3/1/3/131383651/dipisegafoxi.pdf
    • http://files.thetlacademy.shop/uploads/1/3/1/3/131384789/dupive-madelubupazape-dezarekinoza.pdf
    • http://files.music.shenfieldlearning.com/uploads/1/3/1/6/131636843/tufow.pdf
    • http://maxez.gilacheer.com/uploads/1/3/2/6/132680955/dexalonarunod_dirumiwe_lazek.pdf
    • http://files.nickpateras.org/uploads/1/3/2/7/132710655/d914f150ae.pdf
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/25830084972.pdf
    • https://cdn.shopify.com/s/files/1/0430/0763/9711/files/tekowepiloxusazisosiguzi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8277/files/22616881566.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/44375931973.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/19270236937.pdf
    • https://cdn.shopify.com/s/files/1/0435/8956/6623/files/boards_and_beyond_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/jupulemilafifep.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/gapivajidufoxudexawebire.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_off0000606e.bin
278cd1fe4e2de6775b68dcc5cf7eed82db371a5a037b33d11a2f0f33487a4022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x606E 1708 bytes
font_01_sfnt_off000068f9.bin
021cb28f1d735e371c037591816809a86c1ee4bc17e7d0687ee0ff685322cd4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68F9 4932 bytes
font_02_sfnt_off000079ae.bin
c3909f4e94d0a0432b00df8fadd790536e3cf88a8fca1e388ca6dc8b89b1c030		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79AE 13216 bytes

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