Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c9d9c293779bdfd…

MALICIOUS

PDF

57.7 KB Created: 2020-09-16 14:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0043be79f08a791d893d9270af3e7ff9 SHA-1: 71db6bf9093ea7e347cdec695fb01860866d99e8 SHA-256: 0c9d9c293779bdfd5edaf38a20a7ae092a2b2739ac51346497cd8478e778bc33
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=underwood+olivetti+typewriter+manual'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are benign but one is flagged as malicious. The ML classifier also strongly indicates maliciousness. While no scripts were extracted, the presence of a malicious URL within the document body suggests an attempt to redirect the user to a potentially harmful site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=underwood+olivetti+typewriter+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0ecd3403-9dd7-4fb9-9d18-3d1d39d52f62.filesusr.com/ugd/a72fa8_eeb466b688214ee4954afc9c11a86f56.pdf?index=true
    • https://f6e319a4-713a-483d-b235-f73977ff8f3b.filesusr.com/ugd/974a4e_5a74700a305941d9a01613f9387fe289.pdf?index=true
    • https://1d3742af-7874-477e-85ac-9cf69a4c9358.filesusr.com/ugd/035627_852d601bb5204ba08a8ee3c4da8f6ec7.pdf?index=true
    • https://90e73530-697a-4d69-bc73-991a04ed4f84.filesusr.com/ugd/3be48b_af3adf347b9c400bbe38893025c9b89c.pdf?index=true
    • https://ab0f623f-7d6a-4c58-b751-c42d2c0d4320.filesusr.com/ugd/a91264_9e9d6196ef164a208f8e535d6c1016d6.pdf?index=true
    • https://fe6569bc-6d09-46d5-a0e3-760873b2f944.filesusr.com/ugd/9df9d6_4e88f6b474994e4f9b6d1ee0a92e7b8c.pdf?index=true
    • https://1827b85c-b2dd-459f-b7b4-68c54900d218.filesusr.com/ugd/dcc11b_dce5625eb2144b3f9551015fa2676ad5.pdf?index=true
    • https://e299cd96-f5fa-4e4d-b8e8-22454be6cfe7.filesusr.com/ugd/f08e01_679e309ffc6a4bc384e90ec11d4089a6.pdf?index=true
    • https://64cedf5c-1026-49ef-9df2-49cbf570f55d.filesusr.com/ugd/d2759c_40b4a8dc3157432db408fbab16015b5e.pdf?index=true
    • https://ebaf1a0a-61f2-488f-a1d5-c2301404be89.filesusr.com/ugd/dcc11b_0e021d34e4164175b5286ac341244497.pdf?index=true
    • https://1637c2ce-2b6e-43f0-9153-903a86efd820.filesusr.com/ugd/89064d_3cc4a6767bbe4cac9dbfac4ba199f34f.pdf?index=true
    • https://338b4140-b0ca-4705-a12c-7d6cacfe3066.filesusr.com/ugd/314c35_4df00b81b80d48cc95f2aecbf14ed47f.pdf?index=true
    • https://fe4c9c8d-c2f2-4ae8-9e53-7eec50c502f4.filesusr.com/ugd/277b62_c70ec0c622f6463daeeacb160a2a7fc0.pdf?index=true
    • https://23c6e5a5-d0da-4185-b800-a59825db5807.filesusr.com/ugd/565485_2daa4fe856104bf0b50fad835ebfcf5c.pdf?index=true
    • https://3d7d24aa-142d-4dd4-9436-5c17ddd0cbdd.filesusr.com/ugd/3ed902_d279033596604201bebdba632a4b7f94.pdf?index=true
    • https://8c2925b9-f09c-420d-ad2d-a2760fcb934b.filesusr.com/ugd/0af078_b8213348f7914b958a9b2f6ab636000a.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000098ab.bin
e6b6fead4a5d7c0098f2458ac8615fdc50ffb65bff3db8c3e86bc18cb734d2bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98AB 5172 bytes
font_01_sfnt_off0000aa46.bin
d242573cd49a213ab2571305c3afe7e98dd689399d81c69d3376441a2c86212f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAA46 15516 bytes

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