Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df1c9932f80145b…

MALICIOUS

PDF

34.0 KB Created: 2020-08-07 08:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc4a89a145213bd50372408152b4959c SHA-1: 288a27f604f9c7f7fa21203d2a97f0960210c021 SHA-256: 9df1c9932f80145bb8f09e3fe8b15b5a3f445bb1d3d8633fb87cda304aea9109
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, with the primary malicious redirector being ttraff.cc. This suggests the document's purpose is to lure users to malicious sites through a deceptive link farm.

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=fasciola+hepatica+bovinos+pdf
    • http://files.tdjservices.com/uploads/1/3/2/6/132680813/6d70e4.pdf
    • http://files.wayofthemaster.ca/uploads/1/3/1/6/131637307/1116762.pdf
    • http://files.andersoncontemporary.com/uploads/1/3/2/6/132682882/dakafitiziweji.pdf
    • https://cdn.shopify.com/s/files/1/0432/7122/5494/files/bubajuzozijopogim.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8136/files/wuxodetexijitejufekamos.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1232/files/wizazitolevegoro.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/batot.pdf
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/poguw.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/81802354115.pdf
    • https://cdn.shopify.com/s/files/1/0427/4988/6620/files/kavetokosij.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/1076640227.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/falunovusupodumugonezugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/3467/2285/files/jedanudetaliwoz.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_off00004a4a.bin
4b76da55d85aa6d3d5552fadd6817e19021889ef946031d0e1293763edfc5fcc
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A4A 5304 bytes
font_01_sfnt_off00005c53.bin
603286a62d97102340929e777b397c6ee31d8ab7ff9adb0909c059e647fea47b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C53 9148 bytes