Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4e8c1c314cb046…

MALICIOUS

PDF

52.3 KB Created: 2020-08-30 22:12:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e33e0a30abe4dbebe7f3ec4589fc3c39 SHA-1: cb52dc04d6e789f3201d4a85435975585c27a800 SHA-256: 7b4e8c1c314cb046a40cde319e2ffd27d1a57cd9d44528d0257d6df41e01ce45
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though partially corrupted, contains text related to creating Gantt charts in Excel, likely a lure. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to benign Shopify URLs, but one critical link directs to the malicious ttraff.com domain.

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=how+to+create+a+gantt+chart+using+excel+2016
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/71274509571.pdf
    • https://cdn.shopify.com/s/files/1/0430/8218/6905/files/complete_human_body_anatomy.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/rifuwofujivibine.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/31170411487.pdf
    • https://cdn.shopify.com/s/files/1/0438/8392/1563/files/56056473287.pdf
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/durga_saptashati_mantra_in_sanskrit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98973723668.pdf
    • https://static.usrfiles.com/ugd/b8c837_42717236b40443d0974665c2105e88a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b7381071972346f296888b70f5ad0415.pdf
    • https://static.usrfiles.com/ugd/b8c837_21f6cabfffad41a5b9899de05f52b16f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c4be4313a44495b99655cff6b94bfca.pdf
    • https://static.usrfiles.com/ugd/40512e_a62810d2436b403b8400a13ee229a01f.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/search_engine_documentation.pdf
    • https://cdn.shopify.com/s/files/1/0433/7955/6504/files/87386267206.pdf
    • https://cdn.shopify.com/s/files/1/0433/1444/6489/files/wefezekaburaredaba.pdf
    • https://cdn.shopify.com/s/files/1/0434/4781/2248/files/jutete.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/4185944708.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083a9.bin
04d1d07d60558a369b02b0f37cb8156c42044aff27c4fe749e3b03615a94729a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A9 5660 bytes
font_01_sfnt_off000096f4.bin
a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96F4 1800 bytes
font_02_sfnt_off00009f81.bin
173bfa1409b91b753720b511a5f3181675948705ba16262244a3f4b13494ec18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F81 10688 bytes

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