Malicious PDF — malware analysis report

Static analysis result for SHA-256 0738fa2e3af97e16…

MALICIOUS

PDF

44.4 KB Created: 2020-08-29 15:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f360cc4ee19ed22e3df845612610b269 SHA-1: 7e743af1c1871a2a7ac4e8dac6b05b24d8654f87 SHA-256: 0738fa2e3af97e164111d89f82e52b4285c5357d8801b50c7cba339ce0dd5ea0
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of numerous links suggests a link farm or phishing attempt. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found in the heuristics, indicating the document's intent is to direct users to malicious sites.

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/wix?keyword=bascom+jones+magick
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_3b11887d8f7c40c7922343d1fcf48a53.pdf
    • https://static.usrfiles.com/ugd/b8c837_98a7132ed7234b72bab264bd7715e189.pdf
    • https://static.usrfiles.com/ugd/4dd980_1fc9102c67044c2ebb80c203dd022bc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f73c7d0a84141f9b3453a32242d03eb.pdf
    • https://static.usrfiles.com/ugd/b8c837_39b62fde182245a490cdfdb8545c9830.pdf
    • https://cdn.shopify.com/s/files/1/0434/5305/5128/files/22701880518.pdf
    • https://static.usrfiles.com/ugd/b8c837_13a29daf94d34ddf9d42570129b4add8.pdf
    • https://static.usrfiles.com/ugd/b8c837_531bfd49a313432182eb865a40269856.pdf
    • https://static.usrfiles.com/ugd/b8c837_1055622cf7514a72b97882590e5e2772.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd2312a66bca4ca287641161d6b601fd.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/49061815742.pdf
    • https://cdn.shopify.com/s/files/1/0440/7400/8741/files/volleyball_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/zoriwaroretovod.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_off00006f84.bin
376ed592669dd186f8fd3552fe1adfce91c863f463e42da1e8971c7b55bd3568
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F84 5180 bytes
font_01_sfnt_off0000811a.bin
f92d4d7ae39c205f7ca098dcb4d4cc1576baaea40f46190c2d907ca446c24e7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x811A 10556 bytes