Malicious PDF — malware analysis report

Static analysis result for SHA-256 028514424a7c85d6…

MALICIOUS

PDF

39.5 KB Created: 2020-08-30 05:59:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a233a26ffcbb02f9d7cbaa7b3811e1f SHA-1: 291c456a4e879d4bcb6b1690e894347e001979c3 SHA-256: 028514424a7c85d63a8ace2b5c32f1ddf8ce6fbd0b624ba944e05886f6edb2e8
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL observed is https://ttraff.club/wix?keyword=haccp+manual+template+free+download, which is likely intended to trick users into downloading malware or engaging in phishing. The ML classifier also strongly indicated maliciousness.

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.club/wix?keyword=haccp+manual+template+free+download
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0451/7101/5829/files/35555188543.pdf
    • https://cdn.shopify.com/s/files/1/0433/3705/6414/files/podenid.pdf
    • https://cdn.shopify.com/s/files/1/0437/9980/6113/files/lil_boosie_show_the_world_mp3.pdf
    • https://static.usrfiles.com/ugd/b8c837_19ee4eedaeb04954a20a3e07c9d8c732.pdf
    • https://static.usrfiles.com/ugd/353d00_871d5e7893624112a4ad9d08676d5609.pdf
    • https://static.usrfiles.com/ugd/d99ef3_b385db8b841e44dc952f8a266a423cd7.pdf
    • https://static.usrfiles.com/ugd/41a0b6_3af9b3f0fd54470099d6272b438fabca.pdf
    • https://static.usrfiles.com/ugd/9e53d4_597a53179bf946858ca207d6bd8d1d08.pdf
    • https://static.usrfiles.com/ugd/b8c837_31e17141cec84f3680680dc50bba2ba8.pdf
    • https://static.usrfiles.com/ugd/b8c837_edc23c0009a0451db847f24e5f13d090.pdf
    • https://static.usrfiles.com/ugd/5438e3_e6acdc44ce9c4bb1b5dcb97458688501.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ce5c42005af4c70bb00e2326beefddc.pdf
    • https://cdn.shopify.com/s/files/1/0428/8918/3398/files/faulty_coordination_and_subordination_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/7825/4753/files/sudalidebipafudiwisu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cc2.bin
3adc0bd5023bbedcf02a613fa8a8e169439ec4cc9673eba76e81190822b8f278
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC2 5176 bytes
font_01_sfnt_off00006e53.bin
c3b47529fd9c1b0a36d613d7c77bed98e62d5ed432b94a841f250c53ef8ae15f
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E53 10508 bytes