Malicious PDF — malware analysis report

Static analysis result for SHA-256 8774e14f748e490a…

MALICIOUS

PDF

45.5 KB Created: 2020-08-31 16:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a945eefd80c0467dc8065ea9fccd0b7 SHA-1: b0b4bd12a3ad64f8cd6064708dc191bd33eeaa1b SHA-256: 8774e14f748e490a57c43ca0ebe348d2dac3346a1f555db5ad60238570577f33
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to a movie and the malicious URL, suggesting a lure. The presence of a large number of external PDF links, many pointing to Shopify, indicates a link farm designed to obscure the malicious destination.

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.com/wix?keyword=asterix+and+obelix+animated+movie
    • https://cdn.shopify.com/s/files/1/0434/3457/3991/files/guluwesusas.pdf
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/amu_admission_2019_class_11_form_date.pdf
    • https://cdn.shopify.com/s/files/1/0438/2723/2918/files/collecting_money_for_notes_receivable.pdf
    • https://static.usrfiles.com/ugd/510a18_50e6981eb2cc46a4b9f80723e6bff4d7.pdf
    • https://static.usrfiles.com/ugd/5899d5_f28f6e5395594d6fadd7e14b21e0e076.pdf
    • https://static.usrfiles.com/ugd/b8c837_d2e7247bb0044db9b5e64c5a0c58f8ea.pdf
    • https://cdn.shopify.com/s/files/1/0430/5590/6973/files/33485013338.pdf
    • https://cdn.shopify.com/s/files/1/0437/7457/4749/files/bandhan_movie_song_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/68223208543.pdf
    • https://static.usrfiles.com/ugd/5ad03d_0d89269fd7f64295a43bc2840a9fd98d.pdf
    • https://static.usrfiles.com/ugd/b8c837_51b0f10196fc49fb995db2fd324f2de6.pdf
    • https://static.usrfiles.com/ugd/4ae4db_41033e0686274695b07f8bf4e55834cb.pdf
    • https://static.usrfiles.com/ugd/912de2_274a57dd66f943ac89dcfa94f1f32265.pdf
    • https://static.usrfiles.com/ugd/0a0016_7026ddf449e242fcadb38f213af77b99.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_off0000742f.bin
682ff703d752d72d00366fdefc7ca3b335cba8877aae15b2c81ac03cdbc119e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x742F 5228 bytes
font_01_sfnt_off000085e0.bin
c6455e1072f9ab90130a972613275fb8b776c75f2716aabd5fa707105c77d2a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x85E0 10380 bytes