Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13189720a99dc9d…

MALICIOUS

PDF

38.5 KB Created: 2020-08-25 11:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 022b20ffd042a9a66ecc7b15bad49032 SHA-1: 7d2adb802f72d24bbc76d8b128234c9f26907a1c SHA-256: f13189720a99dc9d892099b354fb9008b8c190444afa9f2b706cf1c8a7ed6c2a
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body text, though heavily obfuscated, contains the string 'Bouncing ball video clip free' and the malicious URL 'https://ttraff.com/pify?keyword=bouncing+ball+video+clip+free', suggesting a lure to a malicious site. 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=bouncing+ball+video+clip+free
    • http://files.vanbarfitness.com/uploads/1/3/1/4/131437984/9016547.pdf
    • http://files.thecauldron.restaurant/uploads/1/3/1/4/131438899/8852299.pdf
    • http://fovoti.suepaton.net/uploads/1/3/0/9/130969042/f84f5d5170df9ae.pdf
    • http://mubozi.namiracine.org/uploads/1/3/0/7/130738667/renabus_tufifusadis.pdf
    • http://files.sheilatrecartin.com/uploads/1/3/1/6/131637553/da43f863e.pdf
    • https://cdn.shopify.com/s/files/1/0432/8089/2057/files/mapamundi_politico_para_imprimir.pdf
    • https://cdn.shopify.com/s/files/1/0447/8540/2013/files/boston_scientific_latitude_6290_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/4848/4507/files/71372298847.pdf
    • https://cdn.shopify.com/s/files/1/0437/6743/1329/files/input_validation_c.pdf
    • https://cdn.shopify.com/s/files/1/0432/7302/7749/files/tokajibigawofipexerisozu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/wepunip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5742/2229/files/75620724427.pdf
    • https://cdn.shopify.com/s/files/1/0440/0414/7350/files/tisodizofaru.pdf
    • https://cdn.shopify.com/s/files/1/0434/8834/6262/files/dujaruvaviduzenovuvexiwal.pdf
    • https://cdn.shopify.com/s/files/1/0440/6312/9765/files/12930256249.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_off000057ed.bin
3ac0334be62310cb7b156868632cbd1eb67d451dbf892d1b5c40ed4c78bdb17e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57ED 5396 bytes
font_01_sfnt_off00006a5c.bin
65d7e4be425409a78bac2e5cf513429c8260799ea76db9fed1be0d370b9b2dba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5C 10228 bytes

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