Malicious PDF — malware analysis report

Static analysis result for SHA-256 1000c6058badd69d…

MALICIOUS

PDF

45.8 KB Created: 2020-08-29 23:38:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e21c258c127a191362ffd984577f7c5 SHA-1: 6a69bd02abef9bab3138a2f8fe70b9466679f7c2 SHA-256: 1000c6058badd69d5a322905438dd24f0e161bb0fd6283e3fc3eed74bf47b601
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external PDFs. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to drive traffic or engage in SEO poisoning.

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.ru/wix?keyword=the+good+wife+parents+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/e3ff21_4058c7ecbfe44e71a56fa09caa78c9e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb84cf07cb554ad3975fcabfcd600b8e.pdf
    • https://static.usrfiles.com/ugd/b8c837_828c7b6b1e374f26b03c6deba4942538.pdf
    • https://static.usrfiles.com/ugd/865d50_f88c90512938426da9c54e94f968b0b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_2834814971b8414ca577aa28b115deb1.pdf
    • https://static.usrfiles.com/ugd/63d3ad_e5771d7534a142c8a91cbf019fab35f4.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cb7a68ba40f40898af76c2d6bd1c429.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/wow_classic_engineering_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/0642/5249/files/48452998539.pdf
    • https://cdn.shopify.com/s/files/1/0437/9744/6816/files/fatiwij.pdf
    • https://cdn.shopify.com/s/files/1/0436/8151/3622/files/39169783900.pdf
    • https://cdn.shopify.com/s/files/1/0431/2147/5738/files/44943333420.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067aa.bin
f1a373787e28636b9c54ba2a6d5fec9e5d83a0eb003e311cc782510befc4b175
pdf-font-stream PDF embedded font (sfnt) at offset 0x67AA 5196 bytes
font_01_sfnt_off00007962.bin
5572d89df7aee1015a29536e3348bac4c3a5cbf810724dab55bfefd5f294490e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7962 10340 bytes
font_02_sfnt_off00009cc1.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x9CC1 4324 bytes