Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d4fb61ce5e82f1…

MALICIOUS

PDF

56.7 KB Created: 2020-07-26 11:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c72bef3a071790896b799595b10838ce SHA-1: 7d505c8cd877954b415a1857c387a9961bbc313d SHA-256: 81d4fb61ce5e82f1ebdd5c0c46864c675b668747895039de9eb2f00ae7319822
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary link directs to 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, suggests a lure related to 'Health Canada alcohol consumption guidelines', indicating a potential phishing or scam attempt. The presence of numerous PDF links, including one to a Shopify domain, suggests an attempt to distribute further malicious content or redirect 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.com/pify?keyword=health+canada+alcohol+consumption+guidelines
    • http://files.jodiehommercounseling.com/uploads/1/3/0/7/130739835/kodake_zaxim.pdf
    • http://files.ottercontrol.com/uploads/1/3/1/3/131379205/7964546.pdf
    • http://files.litzmusic.com/uploads/1/3/1/3/131384286/gudapov_sajelulalarola.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2254/1209/files/65889714017.pdf
    • https://cdn.shopify.com/s/files/1/0430/3667/2162/files/kodewivixovumagot.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/76424064168.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50306279194.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7938/files/6495100628.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/67687206325.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/40913497022.pdf
    • https://cdn.shopify.com/s/files/1/0433/7850/7934/files/57242800504.pdf
    • https://cdn.shopify.com/s/files/1/0430/1661/8145/files/wabubegutanedonofudizope.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3627/files/voferi.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_off00009f98.bin
67a9ee88145f312bd6dd86fb9a09e0a3dd607d92e119c6fb2420759d8e6bb979
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F98 5236 bytes
font_01_sfnt_off0000b131.bin
a77bd6709df24d7d3b0041d7e9bb71453e7bb33d591635a94559a17d82f91545
pdf-font-stream PDF embedded font (sfnt) at offset 0xB131 10624 bytes