Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb80298d7c1c641e…

MALICIOUS

PDF

44.0 KB Created: 2020-08-27 13:31:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8ae59218c79c18b77853fc7484c2311 SHA-1: b28699c9d7bd5225c1d5924071357bd71d1236a6 SHA-256: cb80298d7c1c641e03c9d67abde6c64b077edaac0b74021973eaa10ba6b33bbc
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 a critical link to a known malicious redirector. It also features a large number of embedded links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is https://ttraff.com/pify?keyword=map+testing+scores+chart+2012, which likely serves as a gateway to further malicious content.

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/pify?keyword=map+testing+scores+chart+2012
    • http://veferajor.tskjesusfreak.com/uploads/1/3/2/6/132680835/noxezafipewodabofome.pdf
    • http://files.bearlycake.com/uploads/1/3/1/4/131437670/murokejekutowobas.pdf
    • http://files.jesus5.com/uploads/1/3/1/1/131163705/ruzusevafefuza_zasamaxavufa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/37714260878.pdf
    • https://cdn.shopify.com/s/files/1/0430/5816/7959/files/princeton_review_biology_coloring_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/0563/9836/files/bardoli_satyagraha.pdf
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/96341526554.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53741046047.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/21391040230.pdf
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/4630565852.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/53764730929.pdf
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/nonit.pdf
    • https://cdn.shopify.com/s/files/1/0434/6550/6966/files/quickbooks_2015_download.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_off00006d99.bin
e3779347e528d07c72f879bbece3c3f77aa02b5e22b18d52fff29a28166fbb6d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D99 5496 bytes
font_01_sfnt_off00008047.bin
5d3fcb01045b6c18552052f3e4f93753677ec4e6417929efa04d158bad94326f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8047 10120 bytes