Malicious PDF — malware analysis report

Static analysis result for SHA-256 6af08abd9bdb8833…

MALICIOUS

PDF

51.1 KB Created: 2020-08-30 16:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60b7803c7a737d01d632d08c35cb5bd4 SHA-1: e8948480cfc6039f34d6bffdd873a64662705eb6 SHA-256: 6af08abd9bdb8833f4c0ff1586ea88209c44a8f73ff942c45074e109309302b1
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to a known malicious redirector, ttraff.com, which is likely used to host or deliver further malicious content. The PDF also functions as a link farm, containing numerous links to external PDFs, many of which are hosted on Shopify. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector URL supports this assessment.

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=noma+snowblower+parts+diagram
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/thinking_recursively_with_java_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/7939/1637/files/biomass_briquettes_manufacturing_process.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ziwodukujaluladiludu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1008/0420/files/instagram_bot_tool.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/83715562626.pdf
    • https://cdn.shopify.com/s/files/1/0433/5206/4155/files/effects_of_air_pollution_on_human_beings.pdf
    • https://static.usrfiles.com/ugd/429b25_0a2899f0c18a468b9ba7bdddf926f657.pdf
    • https://static.usrfiles.com/ugd/2c608b_2f897b07b15448ba866b545ac8469ae6.pdf
    • https://static.usrfiles.com/ugd/b8c837_463de93d2f4c4289be6300a96b299f5c.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c9b3ba46b3143a5a3cb622ac9fb4cc7.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c63312f38c64bf080af884e03bedf1d.pdf
    • https://static.usrfiles.com/ugd/b8c837_1600073688ea4d9a8fd4ee1a316df543.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_off00006ed0.bin
dddc528f7d90082952a016755f3876dbf58b7abec4f948ef3d03b95bef8b6e76
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED0 7748 bytes
font_01_sfnt_off000088fe.bin
e0f6713d8c27aa2b9e3f97b11a1cf4764f4a0299c955857ec0f28a56216640ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x88FE 5480 bytes
font_02_sfnt_off00009b9b.bin
e9e99d8832e4e453a26df4b30a4e686ee7295bf8c74fe665beeddc5129321b95
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B9B 10836 bytes