Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcdf9d042b0cfa6…

MALICIOUS

PDF

120.9 KB Created: 2020-08-05 05:21:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44ba9e7c844085c07cefd2ed76d4b9ed SHA-1: e1142595a0815e39089b90df96bbe4d8a5afc413 SHA-256: 6dcdf9d042b0cfa69f3b3c54eab714bab0d141e77b69eda6f8b0cdcb96e1ca6d
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to further malicious content. The document body, though heavily obfuscated, contains keywords related to 'Haccp codex alimentarius standards pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm strategy to potentially improve search engine ranking for malicious content.

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/pify?keyword=haccp+codex+alimentarius+standards+pdf
    • http://files.purrkur.com/uploads/1/3/1/6/131607029/c157bbf2672c.pdf
    • http://files.insitju.com/uploads/1/3/1/0/131069904/37120711f58.pdf
    • http://wabejowi.addisonwilhite.com/uploads/1/3/1/4/131406893/mineri-xunaleroloboniw-mudigerajipulen-kamok.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/35901650846.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/islamic_articles_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/10499001311.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/liwukepurenugiweda.pdf
    • https://cdn.shopify.com/s/files/1/0432/2656/2722/files/netogoxus.pdf
    • https://cdn.shopify.com/s/files/1/0428/4507/7660/files/rumisevexepas.pdf
    • https://cdn.shopify.com/s/files/1/0433/0258/4480/files/2310578939.pdf
    • https://cdn.shopify.com/s/files/1/0432/0978/5512/files/xapajavakizo.pdf
    • https://cdn.shopify.com/s/files/1/0441/1044/6744/files/carrion_crown_interactive_maps.pdf
    • https://cdn.shopify.com/s/files/1/0432/4042/3592/files/minecraft_powered_rail_spacing.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1261/files/libros_de_materialismo_historico.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_off00019fad.bin
00b558bf34075b6644337ede97646e6ca0166e63d1a5ab3c187e71c56c890d37
pdf-font-stream PDF embedded font (sfnt) at offset 0x19FAD 5332 bytes
font_01_sfnt_off0001b1b9.bin
3a684f25f82f1fb9158600b7d96c768033201bdf412300a343199a75b1cba55c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1B9 10668 bytes