Malicious PDF — malware analysis report

Static analysis result for SHA-256 070a4ef7efc3f654…

MALICIOUS

PDF

35.7 KB Created: 2020-08-30 07:29:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2607dafd3015e4aeb6e4f1feec934c8d SHA-1: 1c0309403084ddb39b2dfc99688ba565b6bd6ddf SHA-256: 070a4ef7efc3f65447e4017cdcdf7ac6dff659ba0570808c069209bbcdfa6d3a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, a common tactic for SEO manipulation or redirecting users to malicious sites. One of the linked URLs, ttraff.ru, is flagged as malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes the 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.ru/wix?keyword=minecraft+industrialcraft+2+stirling+kinetic+generator
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0448/1702/3138/files/decode_base64_javascript.pdf
    • https://cdn.shopify.com/s/files/1/0438/3988/1376/files/fagojiwo.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5995/files/27302794438.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/sublime_40oz_to_freedom_zip.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/2009_mini_cooper_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/7656/7711/files/delorexowaxivuvikav.pdf
    • https://static.usrfiles.com/ugd/e8506d_ab5125286c04468f8b5d3e197129cce1.pdf
    • https://static.usrfiles.com/ugd/cdb50c_ab0b9dc7efe84867801a359174474a39.pdf
    • https://static.usrfiles.com/ugd/79cb75_10304211fd7344f38b7cb4be91b0852e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4e09d8b6de35499d85ff50e2c54497e0.pdf
    • https://cdn.shopify.com/s/files/1/0437/2224/4264/files/borbaad_movie_all_song_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/alcoro_sagrado.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_off00004cdb.bin
6c027de085586f2808d09972230d2db9f50be00f748d909bdcafab6e8e9b46da
pdf-font-stream PDF embedded font (sfnt) at offset 0x4CDB 5392 bytes
font_01_sfnt_off00005f44.bin
63ed7e337b270fc8a383b604afd6e95c74809079f2c83babb7d2cdee74aeb60b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 10164 bytes