Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a1aed734f3732f…

MALICIOUS

PDF

42.2 KB Created: 2020-08-29 21:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b16a58770af4243579a401b97d8dc7bf SHA-1: 83e8e682475d1d10a5e8333dc4703dad6421dfb0 SHA-256: 02a1aed734f3732f06437e31d8ad927a74ea0073195d5e51b993b3a2f06d3005
154 Risk Score

Malware Insights

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

This PDF file contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text "Kirkland ham instructions" and a URL pointing to a redirector. The ML classifier also strongly flagged this PDF as malicious. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic.

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.link/wix?keyword=kirkland+ham+instructions
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7809/0901/files/15747230066.pdf
    • https://cdn.shopify.com/s/files/1/0434/1789/5070/files/35956274567.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/zegemodukuzaferalegalora.pdf
    • https://static.usrfiles.com/ugd/b8c837_39a44fc9681047a7a18a1bb62915b09d.pdf
    • https://static.usrfiles.com/ugd/b8c837_807a84efb84e4182b982a49ea297c8d8.pdf
    • https://static.usrfiles.com/ugd/0511f5_152a36e6efe74acc85bdb1239aa0d826.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ae8175f7d8343578c7e89f811b1cad2.pdf
    • https://static.usrfiles.com/ugd/b8c837_8db7c84df905434d967f26799a24a0c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_258a96fa30bd41219800a6511a5ec1bc.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/mla_telugu_full_movie_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/komozupufozi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/26979443000.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/1210236960.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7557/files/football_world_cup_2020_groups.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_off000066b1.bin
e2a60c9e5c728227e7e56e0ac7f241998f7511ee4c318217595669f47a8ad4c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x66B1 5212 bytes
font_01_sfnt_off00007828.bin
6f5a4b4d806d225419fd391de60adf39cb73e0d18026dfd9ba07cba4b25d5417
pdf-font-stream PDF embedded font (sfnt) at offset 0x7828 10652 bytes