Malicious PDF — malware analysis report

Static analysis result for SHA-256 1439ac7de1148df4…

MALICIOUS

PDF

35.7 KB Created: 2020-08-29 21:15:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f55d9d7ec81c13070a90722ca563c0e8 SHA-1: b5a4f7ded9c9702b35bf13fb4527a3a7d23c3f17 SHA-256: 1439ac7de1148df4b7e1cc86e45ab0db9ff8d518f161b03375eb396a0db172ea
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.club/wix?keyword=ge+oven+parts+manual', is flagged as a known malicious redirector. The document body, though heavily obfuscated, appears to contain this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to drive traffic to malicious sites. 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=ge+oven+parts+manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/chama_chama_song_free_mr_jatt.pdf
    • https://cdn.shopify.com/s/files/1/0433/6992/2714/files/madden_mobile_hack_download_no_survey.pdf
    • https://cdn.shopify.com/s/files/1/0462/1303/8233/files/subclinical_hypothyroidism_guidelines_uk.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/34533860223.pdf
    • https://cdn.shopify.com/s/files/1/0429/9236/9823/files/ashokan_farewell_string_quartet.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/cuneiform_bone_carpal.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/vakumorejuru.pdf
    • https://cdn.shopify.com/s/files/1/0436/3101/8142/files/power_system_analysis_bergen_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/5119/5299/files/nupujeseg.pdf
    • https://cdn.shopify.com/s/files/1/0433/4374/1083/files/lurefasaparuzuromew.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/kamojumuzeju.pdf
    • https://cdn.shopify.com/s/files/1/0446/2352/8099/files/tovewi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2024/7462/files/33055925912.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/kukuwefa.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_off00004f74.bin
3b2b859b1592c28bdd0d9607a37bf98e56a3bf7e3b160ca1dc45b70997011f90
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F74 5056 bytes
font_01_sfnt_off00006097.bin
a392b1411c64c3bfc5fafc1b5e728fef8a962738975ba76cf7189b8632f3cb80
pdf-font-stream PDF embedded font (sfnt) at offset 0x6097 9836 bytes