Malicious PDF — malware analysis report

Static analysis result for SHA-256 35579182c0bd31b2…

MALICIOUS

PDF

46.5 KB Created: 2020-08-31 07:56:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22e595d96f8833ee2a54254fbe965020 SHA-1: eccc2f55ff9ea0a383e9d7ddfd09cb1e8e85bc07 SHA-256: 35579182c0bd31b285edacb9a83adc855ad958963ffda3a410e345cf9e758d74
154 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 'https://ttraff.me/wix?keyword=triada+ecologica+unam'. This indicates an attempt to redirect the user to a malicious site. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded links, many hosted on cdn.shopify.com, suggesting a tactic to improve search engine ranking or distribute malicious content. No scripts were extracted from this sample.

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.me/wix?keyword=triada+ecologica+unam
    • https://cdn.shopify.com/s/files/1/0435/7079/0558/files/diputekuzajoti.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/rotirepixivofepimeri.pdf
    • https://cdn.shopify.com/s/files/1/0448/7512/0807/files/activismo_digital_y_telemtico.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/64705146645.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/27640453075.pdf
    • https://cdn.shopify.com/s/files/1/0438/4745/0784/files/godisepegipawula.pdf
    • https://cdn.shopify.com/s/files/1/0432/1689/6159/files/51056659908.pdf
    • https://static.usrfiles.com/ugd/defdb4_eae5d6332ee54b42bf2e99cc11b340c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec80e12df15e4f289b8c212a7c91ffeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_70300b25231c4d90b4d255ab2c11a50b.pdf
    • https://static.usrfiles.com/ugd/d1d005_064d2a3580c04e0eb9cf15e86c8bf438.pdf
    • https://static.usrfiles.com/ugd/9c0842_4664834c61d4438eb62c4ee120f47a8b.pdf
    • https://static.usrfiles.com/ugd/dcfb95_bfec6dee6b9948ce8ba08b33c50aa019.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_off00007692.bin
af331fa9ed02eff2c3179fe150ae8e266600eca89afadecc64c7f057f539d144
pdf-font-stream PDF embedded font (sfnt) at offset 0x7692 5028 bytes
font_01_sfnt_off00008786.bin
a57d722a65b2b6b6c8aa5d213b1f6e833c5283b5b20e06ce46ad1c0bc4a4d1bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 11472 bytes