Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ede6ce47fdda6ea…

MALICIOUS

PDF

42.4 KB Created: 2020-08-17 05:30:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e02740eb6692f141abc607c17df81850 SHA-1: 9cfa84637733e43b610988050ceb7a4bf2580faa SHA-256: 2ede6ce47fdda6ea7c17a037e41c6128abffc672d5fcff26cb58fba86adeab31
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a Dungeons & Dragons 5th Edition class guide. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, many of which are hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering through a deceptive document title, leading users to a malicious site.

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=d%2526+d+5th+edition+class+guide
    • http://fimobube.jlblsource.com/uploads/1/3/1/4/131453858/jukowegixomi-zimudizadugaf.pdf
    • http://files.boingkids.co.uk/uploads/1/3/1/8/131856200/zekusoz.pdf
    • http://files.bothwellfarms.net/uploads/1/3/2/6/132681517/gizakinopape-nosebowi-deparexig-dowabejaxam.pdf
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/jumakevifejugotod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8198/2361/files/48027534907.pdf
    • https://cdn.shopify.com/s/files/1/0440/3465/4358/files/bunkering_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0431/9218/9089/files/24186096421.pdf
    • https://cdn.shopify.com/s/files/1/0433/5697/9351/files/the_unfinished_nation_7th_edition_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dilos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9354/files/81490707687.pdf
    • https://cdn.shopify.com/s/files/1/0437/2486/5685/files/stairs_bunk_bed_plans.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_off00006a68.bin
f160675c5580dff3c73b34ff7910be5a3b332df7dca2dd9ff89af35a2593c860
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A68 4156 bytes
font_01_sfnt_off00007895.bin
fd64cff5b8978d99197e2c6a788d952fc0236a2099b6d7699f5786dc10c347eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7895 11188 bytes