Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0e917a57792409…

MALICIOUS

PDF

62.3 KB Created: 2020-08-02 07:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d35857520a38f1f1a79c47743c800f5b SHA-1: 5f5fed26519322e572ba801b2c8d6ae5a5c2be51 SHA-256: 8b0e917a57792409ebe3d9ed6c09f276fbc07e24003facb59eef0bba789beb01
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, indicating a link farm. The primary malicious URL identified is https://ttraff.ru/pify?keyword=kamen+rider+openings. The document body contains obfuscated text and a reference to the same malicious URL, reinforcing the malicious intent. The presence of numerous Shopify-hosted PDF links suggests an attempt to obscure the true malicious destination.

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=kamen+rider+openings
    • http://files.bsquarepro.com/uploads/1/3/2/6/132683267/1094303.pdf
    • http://files.friartucker.com/uploads/1/3/0/8/130815017/maxik_rawilez_dajaxaxukomumir_pimugab.pdf
    • http://files.burkega.org/uploads/1/3/0/7/130739779/255f3adcb31.pdf
    • http://files.halftheskydesigns.com/uploads/1/3/1/3/131381363/1049197.pdf
    • http://files.shodacars.com/uploads/1/3/1/4/131453657/sugibi_wakokogunexow_rezis_dawaxofitaku.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/63697029024.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/23622483953.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84005007378.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/bubudut.pdf
    • https://cdn.shopify.com/s/files/1/0427/9199/3500/files/xabagedekurukuneduvesuluk.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/wowisililegovafivividu.pdf
    • https://cdn.shopify.com/s/files/1/0435/4523/1515/files/44599628800.pdf
    • https://cdn.shopify.com/s/files/1/0436/6968/4377/files/bijirujusalikug.pdf
    • https://cdn.shopify.com/s/files/1/0434/2539/8945/files/36552798149.pdf
    • https://cdn.shopify.com/s/files/1/0431/0440/3613/files/73962293764.pdf
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/kozojiluwufub.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000097b3.bin
bd8f989e7ea68ca8c872cbdde2efbc94f1aa2aa252b086ef9e76564efca82f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97B3 4404 bytes
font_01_sfnt_off0000a739.bin
841237faec222a788e0877936afab50a52970367f88ab8da42d915ee35892b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA739 5216 bytes
font_02_sfnt_off0000b8e4.bin
7b27b7da6070dad0d75277dca9920a841e0e182eec64e132e41b79e7525838e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8E4 16668 bytes

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