Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8edfe8befea04a…

MALICIOUS

PDF

44.1 KB Created: 2020-08-10 15:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8a28131abc5c926d2b1e1175f54483f SHA-1: 00b959a377f9397e237c2d668d19f067ae1998e5 SHA-256: ac8edfe8befea04a41dc81f5ce966ff32d60336850454daa46ae54fdee8044ea
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 'https://ttraff.cc/pify?keyword=english+dictionary+in+urdu+pdf'. This URL is presented within the document body, disguised as a link to an English dictionary in Urdu PDF. The PDF also contains a large number of external links, many hosted on Shopify, which is flagged as a link farm. The ML classifier strongly indicates 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=english+dictionary+in+urdu+pdf
    • http://files.ahighertouch.com/uploads/1/3/1/6/131606128/mezexozukojuj.pdf
    • http://files.feastva.org/uploads/1/3/0/8/130874543/betiwek.pdf
    • http://files.footstepscounselingaberdeensd.com/uploads/1/3/1/4/131452872/2546700.pdf
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/27912072815.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/98746596246.pdf
    • https://cdn.shopify.com/s/files/1/0430/8988/7396/files/pokemon_gen_5_pokedex.pdf
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/kanomuxifopogujax.pdf
    • https://cdn.shopify.com/s/files/1/0432/2207/3506/files/dujijadupepuwifoki.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/71884769378.pdf
    • https://cdn.shopify.com/s/files/1/0429/8627/4977/files/craigslist_org_lincoln.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/95531956092.pdf
    • https://cdn.shopify.com/s/files/1/0435/8465/1423/files/nomejunilapamajupe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/59607062369.pdf
    • https://cdn.shopify.com/s/files/1/0437/4773/7754/files/giuseppe_ungaretti_poemas.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
stream_005_off000087d1.bin
53205a1cae1243e2b20e27b2d051ffcb76c5c386fc04f02d4894912495fb5d85		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x87D1 17932 bytes
font_00_sfnt_off0000533a.bin
f62dbf5b99e5156b800264a60c1aadda26407ec2f94c055298c9df212bd690f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x533A 5476 bytes
font_01_sfnt_off000065d5.bin
2444b8da4946d7160bc13da200f758749c2307f64254fffb216d71b59454c88e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D5 9892 bytes

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