Malicious PDF — malware analysis report

Static analysis result for SHA-256 92b455fc13e89326…

MALICIOUS

PDF

32.8 KB Created: 2020-09-11 11:20:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00e2e2e5942f845104826b99b9007c15 SHA-1: 74a343ec23c4f324ad93dafc6fe07c26b33cd90b SHA-256: 92b455fc13e89326447bb2c564b5d5a40f83022abad65b08eb14c5829fe05e48
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 of which point to domains associated with link farms and redirectors. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the same suspicious URL, suggesting it is the primary lure. The ML classifier strongly indicates maliciousness, supporting the conclusion that this PDF is designed to redirect users to malicious sites.

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=antivirus+app+apk
    • http://files.kidshoeology.com/uploads/1/3/1/4/131436991/01046b1190.pdf
    • http://buvexole.hometechrenovations.ca/uploads/1/3/0/8/130874426/vidaposaxip-lobuvor-tasatak.pdf
    • http://files.galgositalianos.com/uploads/1/3/1/6/131637553/zonimiwokajux.pdf
    • http://files.toddschultzcompositions.org/uploads/1/3/1/4/131453005/ridumowibaj_ziwigutixizare_jegepeto.pdf
    • http://files.catherinebeerdabasso.com/uploads/1/3/1/3/131380666/983983.pdf
    • https://static.usrfiles.com/ugd/c57cae_38985ff2e1d3470dbeb83fd42166c327.pdf
    • https://static.usrfiles.com/ugd/03ae60_5e812868c7e549798eee92cd42548492.pdf
    • https://static.usrfiles.com/ugd/f1780b_13372b68e89e42bf8ade80be552737c1.pdf
    • https://static.usrfiles.com/ugd/764aaa_270cfd1efccd4f8cba44bcd62bb00586.pdf
    • https://static.usrfiles.com/ugd/f4de5e_bc2913e3a6be42e3b6e60bfedfcb368c.pdf
    • https://static.usrfiles.com/ugd/d8966e_3d24ff2c53f8470f8bdf80066be681cc.pdf
    • https://static.usrfiles.com/ugd/b6edda_bcb497e7105f43cc9d6ab36d24af0e24.pdf
    • https://static.usrfiles.com/ugd/ec0c41_1579691d218f432f8272014b534c2910.pdf
    • https://static.usrfiles.com/ugd/6cfc61_b4dfedcec4ad470289d835b1472ecc03.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_off00004618.bin
cf17a83a5d35bf02b97c79703b898f12f7afaa4fb67438fe8f0bd2266e900412		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4618 4896 bytes
font_01_sfnt_off000056d4.bin
0f1d10d82e051eab25dc89a08a7ebec900b37c54ea9818da7b944ce4d8889ea6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D4 9460 bytes

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