Malicious PDF — malware analysis report

Static analysis result for SHA-256 1343473461a2684c…

MALICIOUS

PDF

40.5 KB Created: 2020-08-29 15:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39e68e4abe5fd10fade57501bca68007 SHA-1: 6eebf8b20949d96ebff3ff5aa01b09a150de95ec SHA-256: 1343473461a2684cbe42921f4b4b0840360df98b87bc7219622290d07c23901c
154 Risk Score

Malware Insights

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

The PDF document contains a lure for a free movie, directing users to a known malicious redirector URL. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a phishing or redirection attempt.

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=cabin+fever+movie+free++in+tamil
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_3cbaa84d9d7345cf81a4212289ed7854.pdf
    • https://static.usrfiles.com/ugd/b8c837_16d77500cd1d46fa8b209575995d7c32.pdf
    • https://static.usrfiles.com/ugd/b8c837_c5569e5a44254fd6b922c71d7cbc4c88.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_93ce8a7f9c6f429cb48f8e120ca20efd.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d5abccfc9204656b8b2e684fdb2f274.pdf
    • https://static.usrfiles.com/ugd/b8c837_25fa82cf29994fff8d4f43bda66b6de5.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4d71394db514285b0e877aaeb746780.pdf
    • https://static.usrfiles.com/ugd/b8c837_1162317c14554f669c70318841d2fa1e.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/tuwesevakigaropidanafitas.pdf
    • https://cdn.shopify.com/s/files/1/0461/9567/1203/files/coordinate_grid_worksheets_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/67076196517.pdf
    • https://cdn.shopify.com/s/files/1/0447/2419/1386/files/jeridonawolopibodibiga.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/56274152082.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_off00006102.bin
b67751e1dc99cad8e0c1a71675e065df6e6b513e78994a9904a40be05ab3f09c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6102 4840 bytes
font_01_sfnt_off0000716d.bin
68c486ac3c4b1db91084adf7a4b0451c21e9d91c5053872be76f45b39d53c711
pdf-font-stream PDF embedded font (sfnt) at offset 0x716D 10640 bytes