Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f9cef5f8ec7577d…

MALICIOUS

PDF

53.5 KB Created: 2020-08-15 05:45:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d78dab52681495fbf2d172bddbbb1101 SHA-1: 2908fb6de951b418e3ceb89e14a5aa0b650a3c05 SHA-256: 0f9cef5f8ec7577d54f96e7736f28c4336d9ac1fd4e0677625021746baabf886
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm designed to distribute SEO spam. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=free+blogger+template+maker', suggesting a lure related to website templates. The presence of many PDF links and a malicious redirector indicates a likely attempt to drive traffic to malicious sites, potentially for phishing or malware distribution.

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.cc/pify?keyword=free+blogger+template+maker
    • http://nukixiv.ombodieslondon.com/uploads/1/3/0/8/130814328/8449486.pdf
    • http://files.sylviasbakery.net/uploads/1/3/1/3/131398231/8e4077e48c.pdf
    • http://files.cjcsmembers.com/uploads/1/3/1/4/131437953/144ed39160423.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/6828/4319/files/2561842956.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/comment_fusionner_plusieurs_fichiers_en_un_seul_fichier.pdf
    • https://cdn.shopify.com/s/files/1/0428/8466/1407/files/romoba.pdf
    • https://cdn.shopify.com/s/files/1/0432/5644/7136/files/gajiwirekafowiso.pdf
    • https://cdn.shopify.com/s/files/1/0434/8100/6246/files/relacion_renina_aldosterona.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/netepokixetoxafakojok.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xasojikunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1700/files/tikofizujowaxusaxi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/76848971705.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/differentiation_chain_rule_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/4823/8236/files/50460432381.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/vabawu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/mefelomepoberi.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_off00009323.bin
2103576f64f1b46ebcf0bd27cce84b667fc6602d6cef57c30d88332047e97e4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9323 5120 bytes
font_01_sfnt_off0000a47f.bin
e37a08320eb3b80936bb7dbe787ae95a42f775b8b77aba0c96c3d0ffe3ee0857		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA47F 10844 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.