Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7e23d31fe02b04…

MALICIOUS

PDF

43.9 KB Created: 2020-08-09 23:16:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0263ee95b369dede170b2633b0a4fb03 SHA-1: 717335c6fe044b272930e0f87bb024f671e2d2cd SHA-256: de7e23d31fe02b048d20ef90c3ec73fbfe98c236fcfd342bee049d4e4d7f5b42
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector. The primary malicious URL, 'https://ttraff.ru/pify?keyword=anthony+burgess+shakespeare+pdf', is likely used to lure victims to a compromised site. The document body, though heavily obfuscated, contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to distribute the malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.ru/pify?keyword=anthony+burgess+shakespeare+pdf
    • http://kivurarup.misfitangelsrescue.org/uploads/1/3/1/8/131871674/faradikuxakidep_wadega_negeribitukiba.pdf
    • http://files.walnutlakepreschool.org/uploads/1/3/1/6/131637529/fd195ae2593b.pdf
    • http://files.narinesookram.com/uploads/1/3/1/4/131483584/xidenike.pdf
    • http://files.irishracehorseowners.com/uploads/1/3/0/9/130969790/4233656.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/12130013464.pdf
    • https://cdn.shopify.com/s/files/1/0432/6948/8798/files/dficit_de_cido_flico.pdf
    • https://cdn.shopify.com/s/files/1/0428/8351/4527/files/75213199497.pdf
    • https://cdn.shopify.com/s/files/1/0429/6671/2479/files/79879736811.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nasodidupafulad.pdf
    • https://cdn.shopify.com/s/files/1/0434/1337/3084/files/9926263514.pdf
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/fomibetunoxodure.pdf
    • https://cdn.shopify.com/s/files/1/0428/8118/8003/files/zisagogisuxox.pdf
    • https://cdn.shopify.com/s/files/1/0429/8643/8807/files/vita_spas_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4719/7594/files/gifajegefiban.pdf
    • https://cdn.shopify.com/s/files/1/0428/1355/4855/files/78689858970.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/2288773624.pdf
    • https://cdn.shopify.com/s/files/1/0448/3697/8849/files/recent_advances_in_food_biotechnology.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6330/files/pipikawe.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_off00006dda.bin
c1d6110dc8e9ae3245c92d47bbaf75ef8a23d5545d32383ac09f01e00d406430
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDA 5564 bytes
font_01_sfnt_off000080d6.bin
48f67341e47661cf76ffb249886262104019d11bddb0886a58a6d433a54e5bb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 9920 bytes