Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff49cf25ca1fd9a1…

MALICIOUS

PDF

47.5 KB Created: 2020-09-19 08:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04ce9f955305bc1529014f2afa256a15 SHA-1: 80a5d628e93e3a1a4ba30b304349d7b8706b4677 SHA-256: ff49cf25ca1fd9a156ed445e04e45c21aae08f0cdb79241e4928a98211a756dd
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The presence of a link farm suggests an attempt to distribute malicious content or phishing lures through a large number of seemingly innocuous PDF documents.

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.me/wix?keyword=hoke+county+schools+nc
    • http://jokoz.themainbistro.com/uploads/1/3/1/8/131856772/pixob_dezegudizomodi.pdf
    • http://files.piommiami.org/uploads/1/3/1/6/131607029/3655132.pdf
    • http://galisir.centroashe.org/uploads/1/3/0/7/130738973/dekutagevufalatulup.pdf
    • http://files.guliagurevich.com/uploads/1/3/0/8/130874295/3c07a.pdf
    • http://files.whitepeacockcoffee.com/uploads/1/3/1/4/131436971/7dad80.pdf
    • http://files.laureltherapy.net/uploads/1/3/0/8/130813646/nozubipuxokekin_bimidatuwaguba_beregogudatuvos.pdf
    • http://bumibezo.nejcrwc.com/uploads/1/3/0/7/130739235/kamikifo.pdf
    • https://5bd10c3e-34ad-4b4e-878f-546a999a2273.filesusr.com/ugd/35c6e2_b7b69ffcc8a94119a2c5babc8e19660e.pdf?index=true
    • https://febb2c21-59c1-4481-a667-662664dd4b05.filesusr.com/ugd/de3d83_60815409e0ea447682c2494f886011ef.pdf?index=true
    • https://9370a5e3-5ceb-4168-9031-8c4a58b2cbc7.filesusr.com/ugd/ce14f3_c3aed003851141a2820b8aaa0fb58f4e.pdf?index=true
    • https://92fb08bf-a41a-471e-b8c0-87e8f94c54ba.filesusr.com/ugd/9ef0c3_a689b528f03341caa465b81c3094894d.pdf?index=true
    • https://e49e859a-76c4-4250-afc6-aa85e1b2af00.filesusr.com/ugd/3ed902_3f168afec2fc4145a5cc7dacd96441b2.pdf?index=true
    • https://b7d3ff3f-31dc-4dde-9235-a6e7b4f08a78.filesusr.com/ugd/345929_f3d16be32e034925a53218b9f28c5ea8.pdf?index=true
    • https://2d0e0991-8f95-4804-bd75-c440d976a0e5.filesusr.com/ugd/a98ecc_98cb4ffd23b6411c880180d2a3d59ad6.pdf?index=true
    • https://cc5af292-f951-4873-95e0-baad3bab0d28.filesusr.com/ugd/a7074a_f66e2f8a010843c8b600a00ebbbf8b32.pdf?index=true
    • 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_off00006f48.bin
d40ac43162181ac10c718d6d6a8f289f9c4520434200f096b2bf4f9c98c5953c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F48 4544 bytes
font_01_sfnt_off00007ebe.bin
5b608280509dd4384e73efde44163247600b1ef5e6cd56c26fde2783a63abca4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBE 10640 bytes
font_02_sfnt_off0000a32e.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA32E 4324 bytes