Malicious PDF — malware analysis report

Static analysis result for SHA-256 8111781db80af58f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-09 19:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8ce5d7b3d7f6fce1834820caf3a43ed SHA-1: 3d0ed4ebde1495123c8ceb09e71111b4dd367738 SHA-256: 8111781db80af58f8fa8bd29efcdff306f2344bf92f9b5159ea054709b2bff80
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'connected autonomous vehicles' and a URL that appears to be part of a link farm designed to attract search engine traffic. The primary malicious URL is https://ttraff.cc/pify?keyword=connected+autonomous+vehicles+pdf, which likely leads to further malicious content. 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.cc/pify?keyword=connected+autonomous+vehicles+pdf
    • http://jutibax.charlesmccarthydigitalphotography.com/uploads/1/3/0/7/130775904/mojom.pdf
    • http://files.rebuildinglauren.com/uploads/1/3/1/4/131454503/bojijudadapi.pdf
    • http://files.rvrescueart.com/uploads/1/3/2/7/132741385/628423.pdf
    • http://files.leecummins.net/uploads/1/3/1/4/131437037/168789.pdf
    • https://cdn.shopify.com/s/files/1/0432/9809/5272/files/loluvumevukaxemedati.pdf
    • https://cdn.shopify.com/s/files/1/0429/0864/7580/files/zogesegirexibonazewipama.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/netubujulemanigegapivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/bapididiferifevojisip.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/65684538561.pdf
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/moneverozo.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/tijofawirobobuwulemugef.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/lapititavitotejakitaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2773/files/nerodupijo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7533/8389/files/dilubevabivopu.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/93058216862.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/jewukiwajajoxozosiresat.pdf
    • https://cdn.shopify.com/s/files/1/0434/5069/5830/files/jojabipebibilu.pdf
    • https://cdn.shopify.com/s/files/1/0435/3415/5928/files/fenaxabibetusufopeset.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/
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/jewukiwa

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006429.bin
81f6d1073b11f11894c046cf90c9b6ce6295dd2a79c2a3f6822b95e40b0e542f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6429 5264 bytes
font_01_sfnt_off000075f6.bin
d132d05a028945dde97c47717661a8fb4807e356e506ab2fdfb6e6eb5145c287
pdf-font-stream PDF embedded font (sfnt) at offset 0x75F6 10244 bytes