Malicious PDF — malware analysis report

Static analysis result for SHA-256 efcede4eabcb5710…

MALICIOUS

PDF

42.2 KB Created: 2020-08-11 09:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8359f67f74f11139bf2a157b1f5f0817 SHA-1: d19bb71261e662fcb8d50b26063188518111cd83 SHA-256: efcede4eabcb5710aeb9fb9868882e8ce185da402853e77dc7f614a5fe176e64
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to `https://ttraff.ru/pify?keyword=adding+and+subtracting+fractions+activity+pdf`. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many of which point to Shopify domains. The document body, though obfuscated, contains the same URL, reinforcing the lure. The primary intent appears to be redirecting the user to malicious infrastructure.

Heuristics 3

  • 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.
  • 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/pify?keyword=adding+and+subtracting+fractions+activity+pdf
    • http://files.pleasingfood.com/uploads/1/3/1/3/131398367/5031752.pdf
    • http://files.marylouriordonandjoancaplan.com/uploads/1/3/2/6/132680874/1317602.pdf
    • http://fidisidok.calgaryruralmedicine.ca/uploads/1/3/0/8/130874277/d3e9394f4643.pdf
    • http://files.alyssastanghellini.com/uploads/1/3/0/8/130874266/44b41a702baf0.pdf
    • http://files.leawood-pines.com/uploads/1/3/1/4/131409274/fa1ee.pdf
    • https://cdn.shopify.com/s/files/1/0437/7529/5640/files/708_296_4502.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/67001390605.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1910/files/carcassonne_safari_rules.pdf
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/john_deere_lt155_parts.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/unofficial_dawnguard_patch.pdf
    • https://cdn.shopify.com/s/files/1/0450/0425/9492/files/pokewofadutefafu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2195/1391/files/php_loop_through_array.pdf
    • https://cdn.shopify.com/s/files/1/0431/1705/2066/files/9922712709.pdf
    • https://cdn.shopify.com/s/files/1/0449/2269/9943/files/disclaimer_audit_opinion.pdf
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/11684275907.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3768/files/anatomical_position_of_human_body.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/91243413804.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/interior_design_job_book.pdf
    • https://cdn.shopify.com/s/files/1/0429/9338/5633/files/toriwanoxaluki.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/
    • https://cdn.shopify.com

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066ef.bin
eec9efd91764f40bde4452b7345ced055e132e4249b8ce5c283469f727f3705e
pdf-font-stream PDF embedded font (sfnt) at offset 0x66EF 5580 bytes
font_01_sfnt_off000079f8.bin
b09b99d425b197b2ff81f43bb95228345995c18518077eefa120084ff2b5356f
pdf-font-stream PDF embedded font (sfnt) at offset 0x79F8 9812 bytes