Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee2ea411585ee119…

MALICIOUS

PDF

103.3 KB Created: 2020-08-07 20:03:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f23a4fdd5dea9cfc8a44258f67f3050f SHA-1: 33d08063808dcbab510fbabcf51917d13b107aa6 SHA-256: ee2ea411585ee119993f37639625f77bc37f248d1ba7e0595d5bf7678cb18ad1
152 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to a redirector service. The primary malicious link identified is https://ttraff.cc/pify?keyword=candide+pdf+magyar, which is known to lead to malicious infrastructure. The ML classifier strongly indicates maliciousness, and the document body, though obfuscated, contains references to the redirector URL. The presence of numerous PDF links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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.cc/pify?keyword=candide+pdf+magyar
    • http://files.thetrustedbankerstore.com/uploads/1/3/1/4/131454523/radupuxa_gulonefaraboziz_fidomediwid.pdf
    • http://files.physicianscodingeducation.org/uploads/1/3/1/0/131070171/sotasiju.pdf
    • http://files.lev-inter.com/uploads/1/3/0/9/130968920/3514300.pdf
    • http://xanewaro.hrv4training.com/uploads/1/3/0/8/130874478/pogedirefato_tifefowametonek_kofexofifasigub.pdf
    • http://files.halloweenmixes.com/uploads/1/3/2/7/132740958/gilutaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/6093/7382/files/begane.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/wibubowurowodu.pdf
    • https://cdn.shopify.com/s/files/1/0451/1835/7669/files/algebra_definition_and_examples.pdf
    • https://cdn.shopify.com/s/files/1/0438/9987/9576/files/88919059179.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/60795174658.pdf
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/28775457572.pdf
    • https://cdn.shopify.com/s/files/1/0432/8128/5286/files/54860697544.pdf
    • https://cdn.shopify.com/s/files/1/0433/8476/6620/files/nujesidabulaxojaje.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96626323422.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/zudut.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/4250316232.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_off00014ceb.bin
b0a64328d629a72f19c46f6418b81456045082346cfaceca7243f578e119ecbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CEB 5156 bytes
font_01_sfnt_off00015e6d.bin
1fd8945608d29f082536c30f117ede2bd9c32c633a625eec2cc0e30c13aa78e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E6D 16092 bytes