Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e2c54c8a155347…

MALICIOUS

PDF

39.1 KB Created: 2020-08-26 18:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d31fabe18b6ff6233854b006536d4ab SHA-1: 5c7e62f86b2014488bc74c8aeb36a91b255b1cb2 SHA-256: 06e2c54c8a15534785fc6a01d4c00b68a0813ae8237300cb2ba11bbf20cc9df3
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary link identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are consistent with a link farm or SEO manipulation tactic, which is often used to distribute malware or phishing content. No scripts were extracted, but the presence of malicious links suggests an attempt to redirect the user to a compromised or 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.ru/pify?keyword=masaaki+imai+aportaciones+a+la+calid
    • http://posigapi.1864hampshire.co.uk/uploads/1/3/1/0/131071157/2623330.pdf
    • http://degakuz.projectgust.org/uploads/1/3/0/8/130874575/f202c.pdf
    • http://files.sportstraumalondon.co.uk/uploads/1/3/1/0/131070799/225cc03.pdf
    • http://files.bettmusicdepartment.com/uploads/1/3/1/4/131407045/6b2e199f7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/62927258974.pdf
    • https://cdn.shopify.com/s/files/1/0440/2806/7990/files/gikezizesulikataduwamero.pdf
    • https://cdn.shopify.com/s/files/1/0434/0826/1285/files/kexegiweta.pdf
    • https://cdn.shopify.com/s/files/1/0462/3305/9479/files/vemiwelevepepukufab.pdf
    • https://cdn.shopify.com/s/files/1/0432/2535/0301/files/gosolog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8852/7013/files/zupuparinozatidus.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8758/files/20610090087.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74098669839.pdf
    • https://cdn.shopify.com/s/files/1/0428/0313/4627/files/zifam.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/minija.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_off00005be4.bin
f19e214342d6f57264a814344d57cacf9058db2f32b651f1950f02d17671ffcb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE4 5288 bytes
font_01_sfnt_off00006dc0.bin
404b6a321f88d2a421e815743a4d6941c10f046b67a17ad39edc88aa514b0d1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC0 9992 bytes