Malicious PDF — malware analysis report

Static analysis result for SHA-256 f577731e6bb67565…

MALICIOUS

PDF

40.0 KB Created: 2020-08-11 16:44:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d027d20c002a5ff9c0b6771be7a2490c SHA-1: 7f6e89d2ffd28f69af5371dc22fcb04338f11021 SHA-256: f577731e6bb675659aadaf7e4b8cd456eac7cb37ba7dc872718e8bcfb71d146d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious File

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits characteristics of a PDF link farm, with numerous embedded links to various domains, including Shopify. The ML classifier strongly indicates maliciousness. The primary attack pattern involves redirecting users to potentially harmful websites.

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/wb?keyword=palladium%20rpg%20pdf%20download
    • http://fodejufus.rotexsilversolutions.com/uploads/1/3/2/6/132681670/pewokanezim-dasud-wizekujovuromu-xofasomobatigok.pdf
    • http://files.shinyheadmusic.com/uploads/1/3/2/6/132681647/lobojinefarodod-relog-revavure-poruxosej.pdf
    • http://files.cramerpottery.com/uploads/1/3/0/8/130813747/7942585.pdf
    • https://cdn.shopify.com/s/files/1/0436/3993/1033/files/sonasom.pdf
    • https://cdn.shopify.com/s/files/1/0428/3521/4503/files/legal_definition_of_land.pdf
    • https://cdn.shopify.com/s/files/1/0431/1960/7962/files/98994023209.pdf
    • https://cdn.shopify.com/s/files/1/0435/5329/2440/files/how_to_change_your_minecraft_skin.pdf
    • https://cdn.shopify.com/s/files/1/0434/6390/1334/files/78141736843.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/7074967355.pdf
    • https://cdn.shopify.com/s/files/1/0432/7093/0600/files/woxidadexaxemudopiwanapin.pdf
    • https://cdn.shopify.com/s/files/1/0429/4053/0854/files/25817189702.pdf
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/wrightwood_ca_weather.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3353/files/paypal_payment_receipt.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004db7.bin
fa2f8a41ebea4b28dfe19f1348c2fa06892c761d88072df7f61e1b0e13b5003a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4DB7 4960 bytes
font_01_sfnt_off00005e77.bin
df4735c78f3513f08a4b2c1e746f650cd686cfe6ce2677d4cc7825200719541e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E77 11324 bytes
font_02_sfnt_off00008397.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0x8397 4324 bytes