Malicious PDF — malware analysis report

Static analysis result for SHA-256 147b1a96b4d9fae1…

MALICIOUS

PDF

43.4 KB Created: 2020-08-10 19:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96d855ae6cf8c24b7a9d8bf5d368e8e6 SHA-1: e146da886c61fda472d85637c83332c7b388bd89 SHA-256: 147b1a96b4d9fae180bb38e0bb385a685b58b85a88ee5a7487794995338fb30c
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.ru, which is likely used to funnel victims to further malicious content. The document also exhibits characteristics of a link farm, embedding numerous external PDF links, many hosted on Shopify. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites, potentially as part of a phishing or scam campaign.

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/pify?keyword=cbc+f%25C3%25ADsica+pdf
    • http://files.sarahpikedesigns.com/uploads/1/3/0/7/130775649/vebarozu.pdf
    • http://files.allinclusivetennis.com/uploads/1/3/1/3/131398430/novirojo.pdf
    • http://files.jrsamshoes.com/uploads/1/3/1/4/131453054/7372303.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6867/0620/files/20087702207.pdf
    • https://cdn.shopify.com/s/files/1/0431/6512/2711/files/exploration_sheet_answer_key_subscribers_only.pdf
    • https://cdn.shopify.com/s/files/1/0437/6936/4632/files/ebook_machine_learning_c_bn.pdf
    • https://cdn.shopify.com/s/files/1/0441/3099/2280/files/world_history_book_file.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5235/files/redajivogujez.pdf
    • https://cdn.shopify.com/s/files/1/0436/2534/9283/files/40971949972.pdf
    • https://cdn.shopify.com/s/files/1/0432/9170/5502/files/85145193690.pdf
    • https://cdn.shopify.com/s/files/1/0435/4582/1338/files/ayushman_bharat_yojana_in_gujarati_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/75894951279.pdf
    • https://cdn.shopify.com/s/files/1/0437/8168/5406/files/37048385897.pdf
    • https://cdn.shopify.com/s/files/1/0446/1415/6451/files/isometric_and_orthographic_drawing_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0431/5008/2202/files/19451517472.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_off000069b9.bin
e27c04787bb55fb0b187142e900ff4f6530d9d4031ae230190741aa05859495c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69B9 5120 bytes
font_01_sfnt_off00007b30.bin
1295267d3ed92ee5e54a1116f266d0cec4c711b075e5af0ae126caa5f49122ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B30 11076 bytes

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