Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e80db50a03dddd4…

MALICIOUS

PDF

41.5 KB Created: 2020-08-30 21:55:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd358622cffc58a2e708fa55d592d790 SHA-1: a8f81d30d1583825de99a50d5d97538ea94b558b SHA-256: 1e80db50a03dddd4651d09c3a4b81cccafb056a9e7f0debc2b07a102f8d38a27
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'ttraff.com'. Another heuristic identifies a large 'PDF link farm' with many external links, predominantly hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/wix?keyword=afro+beat+instrumental', suggesting a lure or redirection mechanism for a malicious campaign.

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=afro+beat+instrumental
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/71689083941.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9736/files/google_drive_templates_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0437/1726/3510/files/biodata_form_resume.pdf
    • https://cdn.shopify.com/s/files/1/0432/9986/4734/files/60931294236.pdf
    • https://cdn.shopify.com/s/files/1/0430/8140/0469/files/bekajevebeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8491/files/gajedidamipuwaluna.pdf
    • https://cdn.shopify.com/s/files/1/0432/4347/1010/files/varices_esofagicas_pediatria.pdf
    • https://cdn.shopify.com/s/files/1/0431/1239/9009/files/fofovawelupigefe.pdf
    • https://static.usrfiles.com/ugd/b8c837_1f98010e7f1a449c86d15ffb029b3a66.pdf
    • https://static.usrfiles.com/ugd/b4a829_0bcd2bdd34a849b7b99dcb82fc7ea4cc.pdf
    • https://static.usrfiles.com/ugd/3f0e57_f16ddde59ddb46549fb9f7cecac188cb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f74.bin
6067976a3dc5db17ab5c8bd87c3d133c83ffec1e3c0c5a07d3952450c13b373e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F74 5040 bytes
font_01_sfnt_off00007080.bin
adab30da6e5f7e4bdd0f17d7a9b24337d57ccc3b83753bd8ae9fb8eda0f3511a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7080 12920 bytes