Malicious PDF — malware analysis report

Static analysis result for SHA-256 9094ce84ad045e85…

MALICIOUS

PDF

45.7 KB Created: 2020-09-04 18:26:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1f3f4e95abe5b535c1cb7bbf98a87dc SHA-1: 8f11f3f71f59b31741c727c147ec802c95a2afc8 SHA-256: 9094ce84ad045e85b3ab864b6f1ebbe44356ab4be921ae7c3d3d867b09d22081
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a malicious redirector link disguised as information about Bitcoin gold address formats. The primary heuristic indicates a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL and keywords related to cryptocurrency, suggesting a phishing or scam lure. The presence of numerous external PDF links, many pointing to Shopify domains, further supports a link farm or redirection strategy.

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.link/wix?keyword=bitcoin+gold+address+format
    • https://static.usrfiles.com/ugd/3de8a6_449e3fcff0864b62aa8c0705b123c500.pdf
    • https://static.usrfiles.com/ugd/63d3ad_d47b02e9efe24a498485766094e54a10.pdf
    • https://static.usrfiles.com/ugd/63d3ad_c731706db21143b5ae94136078ad6633.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/21633820250.pdf
    • https://cdn.shopify.com/s/files/1/0433/3384/5150/files/unholy_death_knight_talents.pdf
    • https://cdn.shopify.com/s/files/1/0428/6038/0327/files/gba_pokemon_extreme_randomizer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/bobidaxida.pdf
    • https://cdn.shopify.com/s/files/1/0435/8320/9633/files/aambala_1080p_hd_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0437/5540/5466/files/40557531188.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1435/files/compound_shapes_worksheet_7th_grade.pdf
    • https://static.usrfiles.com/ugd/ddb60a_49af5a6846f84abfaebcbe524a7c5bee.pdf
    • https://static.usrfiles.com/ugd/b8c837_dd0e606da71a4719a4b2f28e19449558.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_off00007497.bin
6ca9b6454881cdfb0aca257f676a8c820c1ac38bef0c83cbec01b135c48fce76
pdf-font-stream PDF embedded font (sfnt) at offset 0x7497 5388 bytes
font_01_sfnt_off000086d8.bin
a65c0fd6f7f700f22ff1330ef4eb5eca285cb1e688f357b33a9330041b9fff43
pdf-font-stream PDF embedded font (sfnt) at offset 0x86D8 10320 bytes