Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d82d7db83434d3a…

MALICIOUS

PDF

41.4 KB Created: 2020-08-30 02:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04bf4eb09a8a3da4ac91b35d12d03193 SHA-1: a0a5b0272176c45c940640341f642f6cf20f5918 SHA-256: 0d82d7db83434d3ac9c86ce1901a72935708370e3d5c5490933ca87a5e4233e1
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.cc/wix?keyword=on+the+blood+path+borderlands+3, is flagged as a malicious redirector. The document body, though heavily obfuscated, appears to contain text related to 'borderlands 3' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The presence of numerous other PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic. No scripts were extracted, but the primary malicious behavior is the redirection to a known malicious URL.

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=on+the+blood+path+borderlands+3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0297/7700/files/85530095158.pdf
    • https://cdn.shopify.com/s/files/1/0437/5429/1354/files/letter_cutting_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/41230052817.pdf
    • https://static.usrfiles.com/ugd/ea2f88_94c97233c91646198938382917f5852d.pdf
    • https://static.usrfiles.com/ugd/912de2_732547d1d27d489d9efcb12fb12e8535.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2687/files/41723297706.pdf
    • https://cdn.shopify.com/s/files/1/0433/5524/2651/files/miguzukobitenubu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/belozabivawojexujanivewi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/99964020793.pdf
    • https://cdn.shopify.com/s/files/1/0434/7687/7478/files/nda_answer_key_2019.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/abbyy_transformer_14.pdf
    • https://cdn.shopify.com/s/files/1/0431/7587/0630/files/44430997426.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_off0000621c.bin
e0aa0a14cc770268556287f024d0e531c76a519e1871968c14641f5e41ff970e
pdf-font-stream PDF embedded font (sfnt) at offset 0x621C 5376 bytes
font_01_sfnt_off00007443.bin
2ac7ac4ef86d218a52f4640fb703945e9358c252ffaf1249955c0330d36995ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7443 10592 bytes