Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f7f05c718b36cb…

MALICIOUS

PDF

45.9 KB Created: 2020-08-31 21:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9220c28bc2bc53106b5e30fd46b5b6a9 SHA-1: 11740f3f248357bf915329a8ec2de45f26a7ee5e SHA-256: 15f7f05c718b36cb34d0f277ce35981fbaab37db210bf4f5af0903b14ed93e29
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at https://ttraff.ru/wix. The document body, though heavily obfuscated, contains text that appears to be a lure related to a 'Gothic 3 guide'. The presence of many links, including a malicious one, suggests an attempt to direct users to malicious content, likely for phishing or malware delivery.

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.ru/wix?keyword=gothic+3+guide+j%25C3%25A4ger
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8762/5369/files/focus_on_grammar_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8541/files/detalupovuzedaso.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3464/files/zaxodifofuvemivekilodebe.pdf
    • https://cdn.shopify.com/s/files/1/0440/5483/9461/files/bending_moment_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0439/2707/7032/files/63815439526.pdf
    • https://static.usrfiles.com/ugd/b8c837_d555d847c9024a99bd9a694c86e40bf4.pdf
    • https://static.usrfiles.com/ugd/0fdb6d_58169474ded6434c975831872303770a.pdf
    • https://static.usrfiles.com/ugd/32777b_5d829cb8f9c842faa02cb1fc66ed8e8a.pdf
    • https://static.usrfiles.com/ugd/cf79db_ede3c224be124834a2a5b6bb4af3e083.pdf
    • https://static.usrfiles.com/ugd/be19e1_ba438a19f9ee4a4aa8d80ac0868eae6f.pdf
    • https://static.usrfiles.com/ugd/b11f6d_f9d9d3cdcc1345a7a6ef69972ee7b498.pdf
    • https://static.usrfiles.com/ugd/a18aa6_7a1878e0409b4c1eb117ea5be66e1172.pdf
    • https://static.usrfiles.com/ugd/b8c837_c73477439cc14087a76c724466a4ec3f.pdf
    • https://static.usrfiles.com/ugd/c63dba_63dd1cfe459945ec8c9a051184dc0555.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_off00007402.bin
7c5425932fd8c62ce0748bddeaa9324056e52fba559006ca14df00041e1850d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7402 5288 bytes
font_01_sfnt_off00008602.bin
fb0c768ccbf4508726dc5cb97488854b8cdabf3f3ebd4e704b38decc64f7ca00
pdf-font-stream PDF embedded font (sfnt) at offset 0x8602 10304 bytes