Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca1479a9f4ef699…

MALICIOUS

PDF

41.0 KB Created: 2020-08-31 01:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73a2bb24258aabbb07d256c3886757f1 SHA-1: 08e89d277d82ec0ecfb2b1cab386c588f4213ffa SHA-256: 0ca1479a9f4ef6992d49966c7d3ab68d2bdc3c3a07901966cee08a9d683e1152
154 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to redirector infrastructure. The primary redirector URL, 'https://ttraff.cc/wix?keyword=dungeon+defense+reddit', is flagged as malicious. The document body, though heavily obfuscated, contains this URL and other PDF links, suggesting a link farm or SEO poisoning attack designed to lure users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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=dungeon+defense+reddit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/33ab24_d9620c78b70745f7ab9fdb5f142104ce.pdf
    • https://static.usrfiles.com/ugd/69695d_504251902a3b4a0fac8d3cb533549e2e.pdf
    • https://static.usrfiles.com/ugd/538d67_eababd0368474ac691218330e44de8b4.pdf
    • https://static.usrfiles.com/ugd/b8c837_779f679d34cc4bf49bc449e7b4a11641.pdf
    • https://static.usrfiles.com/ugd/b8c837_638cac4b10724680baa180b43a0714e8.pdf
    • https://cdn.shopify.com/s/files/1/0463/4755/0882/files/hill_manufacturing_sds_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0428/2816/9375/files/nesikofenudurejaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/4786/1928/files/westworld_1973_imdb_parents_guide.pdf
    • https://static.usrfiles.com/ugd/dc8a8e_3cfe34eceb9a4fb39ac2d6d5bbc80d6c.pdf
    • https://static.usrfiles.com/ugd/b56239_a230508ea97c4b3b81c71266748da420.pdf
    • https://static.usrfiles.com/ugd/ae059d_a13214e6d762498ea4e0ce33fe770328.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ac059802fc34f08872ac0a45fc587c4.pdf
    • https://static.usrfiles.com/ugd/b8c837_86d3e3027366436b80a3352bdbbf305f.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_off0000649b.bin
6451f7e6e1fdc569a3cf643bfbb487b49101b4f7502cdfed47491cf32a8afcae
pdf-font-stream PDF embedded font (sfnt) at offset 0x649B 4832 bytes
font_01_sfnt_off0000751f.bin
ef896dc4e072887b17d0ae8b7ac0e3cee1b80291ffc147c9c494ffcd88882575
pdf-font-stream PDF embedded font (sfnt) at offset 0x751F 10080 bytes