Malicious PDF — malware analysis report

Static analysis result for SHA-256 930923d59aa7e630…

MALICIOUS

PDF

45.8 KB Created: 2020-09-07 21:50:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ed45380e33031f47929062e4e5bb6c50 SHA-1: e3c32da39af62b099cb70a541f2e6a0e76f15a67 SHA-256: 930923d59aa7e6304a2c9b08ce38c8d437e09e7a3d4e706e26803b2b0f0698b9
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.club/wix?keyword=system+requirements+specification+template+pdf'. This URL is likely part of a phishing or scam campaign. The document also contains a mass external PDF link farm, with many links hosted on Shopify, suggesting an attempt to game search engine results or distribute further 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.club/wix?keyword=system+requirements+specification+template+pdf
    • https://cdn.shopify.com/s/files/1/0432/4186/5384/files/xepajewizamamevof.pdf
    • https://cdn.shopify.com/s/files/1/0462/7493/6994/files/63011331219.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5870/files/soxelejejinigitida.pdf
    • https://cdn.shopify.com/s/files/1/0433/9544/8988/files/nusasaj.pdf
    • https://cdn.shopify.com/s/files/1/0436/5543/0309/files/cash_flow_graph_excel_template.pdf
    • https://static.usrfiles.com/ugd/7ea8bb_5bc723616c0b43d098e40b3c692057f8.pdf
    • https://static.usrfiles.com/ugd/1c8c1e_d6a5968e10924882a6b00c8a496ac78e.pdf
    • https://static.usrfiles.com/ugd/8d57bd_95557c9e47b440f88d688932e4255586.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97285982277.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/24754541003.pdf
    • https://cdn.shopify.com/s/files/1/0468/8245/5709/files/react_native_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0440/8901/6472/files/75047035920.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057b8.bin
82883e6784b5b04d924d1e8b281f7ef855d12aa80f8b5807a45848259d57a201
pdf-font-stream PDF embedded font (sfnt) at offset 0x57B8 5516 bytes
font_01_sfnt_off00006a5b.bin
d8f2826114c9ade8b9e51418edafdc0a4be12a0ff598355af25005310abb8541
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A5B 16032 bytes
font_02_sfnt_off00009c25.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C25 4324 bytes