Malicious PDF — malware analysis report

Static analysis result for SHA-256 08574e3b21c79e1d…

MALICIOUS

PDF

46.2 KB Created: 2020-09-18 10:01:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: daca9055274434b068c1bd99702a1369 SHA-1: b3f5e45d19aec7062cfa129caf4db2a6106b2447 SHA-256: 08574e3b21c79e1d90d7d5529ba55f0c907f22d643a91a359afdaf329f7fce01
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.link/wix?keyword=gears+of+war+4+insane+guide+pdf', likely leads to a phishing or malware download site. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external documents, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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.link/wix?keyword=gears+of+war+4+insane+guide+pdf
    • http://files.linebackerproperties.com/uploads/1/3/0/7/130774964/7744192.pdf
    • http://pupugi.riversendfarm.com/uploads/1/3/0/7/130739353/962185.pdf
    • http://files.liz-turner.com/uploads/1/3/2/6/132681352/7321023.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://72b61392-08aa-4492-9341-1ee521ee2d7e.filesusr.com/ugd/d4579c_453f365434f84382a164af1fcf8d13e6.pdf?index=true
    • https://08f61cc7-3ab7-43b7-8255-5dd5664b345e.filesusr.com/ugd/9c66ff_0f8ea7d38bc544bcbf9f39bc2e48ffac.pdf?index=true
    • https://2353ddae-d9df-46ae-be0b-1701b0b067dd.filesusr.com/ugd/d31907_fa1aea3a4e0d48c1b99d1cf8abbb121e.pdf?index=true
    • https://f81e34c1-d270-4d51-902e-83d08acc859a.filesusr.com/ugd/8cbfce_39542fc186024faf8dc13ecf4c785ad2.pdf?index=true
    • https://d9f82023-ae9e-4160-a035-d356fe04968b.filesusr.com/ugd/affb4a_eb94dc63cb714dff964640ffae0b0fb8.pdf?index=true
    • https://0eb7e8a4-f51e-43ed-adb2-9f8ae63d03a4.filesusr.com/ugd/8b4172_7baf543d62514180a0a8d5c027f88ca6.pdf?index=true
    • https://16ee8420-09c3-465b-ada3-1e9d1e48aa04.filesusr.com/ugd/b914b5_86c9805e1b8444418547e96d26eff117.pdf?index=true
    • https://45dbfadd-0bcb-4005-864d-82a357940234.filesusr.com/ugd/ebbcbd_42211aea39ab4ef582479e36dc2f2f67.pdf?index=true
    • https://067a05d1-852f-4a1d-a1ff-81c45ef1c8bf.filesusr.com/ugd/086daf_b75926084c534afc82175ba48bcbb759.pdf?index=true
    • https://2eb2037e-5cba-4a35-b45d-0f2befc771a5.filesusr.com/ugd/eeb7bd_c118a50ebaca45f6b0d779486d1e8002.pdf?index=true
    • https://0a5beabd-0bce-479e-97c3-5297dee9749e.filesusr.com/ugd/0e6328_e0a060d8893242ce84291bde312c68cd.pdf?index=true
    • https://35b053a3-9c05-46fd-a320-c1961dd9d340.filesusr.com/ugd/b90ba1_d4541e86454d4a54996fff86f4292c4e.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_off00007627.bin
aa8ac2f2901534425aa2f8ad992e59db5ad8134c9b7559c7321243084eb95f97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7627 5388 bytes
font_01_sfnt_off000088ab.bin
3add343894b2eb9be7385a878ef6714c1413237daf3675c0750eb4e40e60af95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88AB 10192 bytes

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