Malicious PDF — malware analysis report

Static analysis result for SHA-256 c284df724e3b40af…

MALICIOUS

PDF

55.5 KB Created: 2020-09-01 04:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12b84f525bf1e3b798b583f8cc142206 SHA-1: 2d907c2eeb0ba69a83e728d9e3eae138b318ce1a SHA-256: c284df724e3b40af244ba9a406f0c03ad402a3f9bb54aab98bb4b9fd5c37ebcc
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO abuse. The ML classifier also strongly flagged this PDF as malicious. The embedded URL 'https://ttraff.com/wix?keyword=china+action+movie+free' is the primary IOC, likely leading to a malicious payload or phishing page.

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.com/wix?keyword=china+action+movie+free
    • https://cdn.shopify.com/s/files/1/0432/1892/7779/files/dulce_et_decorum_est.pdf
    • https://cdn.shopify.com/s/files/1/0435/8566/7235/files/arduino_328p_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4658/3970/files/sarenixemidapimalukibu.pdf
    • https://cdn.shopify.com/s/files/1/0463/1858/3973/files/fadebebove.pdf
    • https://static.usrfiles.com/ugd/286fb8_4bef1ebabb314e789e10ceda4045a9e9.pdf
    • https://static.usrfiles.com/ugd/80bfa9_39f0be0458f3431591584b7a1ce73e00.pdf
    • https://static.usrfiles.com/ugd/b8c837_1b3e225218fd408fb932452f3741da8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_0003321d600c4ca7967a273a0d5821d6.pdf
    • https://cdn.shopify.com/s/files/1/0448/0296/5665/files/tutorials_point_assembly_language.pdf
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/new_holland_parts_online.pdf
    • https://cdn.shopify.com/s/files/1/0432/0365/7887/files/advanced_calculus_fitzpatrick.pdf
    • https://cdn.shopify.com/s/files/1/0448/0322/7809/files/89374848876.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/8129486672.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/bizufififotal.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_off00009bb9.bin
2839b1d3dd1ec666bb6677ced6ae5bf7a872a929297ac5fcf647733a8c60a794
pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB9 4876 bytes
font_01_sfnt_off0000ac2d.bin
c4f99cecd28ce745da67deac4361a8c17079319d9fdd96050569872eae426826
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC2D 10900 bytes