Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c5ced6f9b1ace2…

MALICIOUS

PDF

42.3 KB Created: 2020-08-16 21:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 776e14a260f6e5f94b4ef38226689324 SHA-1: 3aa3cc60aec1ab8bd99dcc0604e64764f74d4559 SHA-256: 04c5ced6f9b1ace26bff5422ba1529ba914d740d19f89bf776354cb5342fbb1c
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 disguised as a link to 'pilates cadillac exercises pdf'. The heuristic firings indicate this PDF is designed to redirect users to malicious infrastructure, likely as part of a phishing or scam campaign. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to exploit users through deceptive 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.ru/pify?keyword=pilates+cadillac+exercises+pdf
    • http://files.fadesign.com/uploads/1/3/1/3/131383323/c7261539ed1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9429/5203/files/39546449913.pdf
    • https://cdn.shopify.com/s/files/1/0431/4103/8234/files/books_of_the_bible_list_printable.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0435/7298/6014/files/sijajiwuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/9005/9176/files/90546386131.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tefukina.pdf
    • https://cdn.shopify.com/s/files/1/0440/2610/1925/files/android_studio_pull_project_from_github.pdf
    • https://cdn.shopify.com/s/files/1/0433/5576/6942/files/keuntungan_jadi_local_guide_google_maps.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_off0000689f.bin
a201a087ad7acb9d38682828082d92ab8b804b3cbbe00871bae1f10a5830155a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x689F 5216 bytes
font_01_sfnt_off00007a6b.bin
490f5b3b45faa53236704ef6244ea51d94f350af62d32ef6f6ce2db5a4f93d18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6B 10012 bytes

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