Malicious PDF — malware analysis report

Static analysis result for SHA-256 c366840e5c472618…

MALICIOUS

PDF

72.9 KB Created: 2020-08-04 16:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9bedde3571d697d089a5c3c6864f9be SHA-1: e0486b271a7338ff6be57a3f13df478e6b600fff SHA-256: c366840e5c47261844bb86af7325b7f406a198176ab66ce394b6ba332b40fa38
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=antonyms+examples+list+pdf'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, likely for SEO manipulation to increase visibility. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=antonyms+examples+list+pdf
    • http://files.sachemeastlacrosse.com/uploads/1/3/1/8/131871704/vetosexevudoji.pdf
    • http://files.stawardstation.co.uk/uploads/1/3/0/7/130775565/7007399.pdf
    • http://files.shape--sanctuary-healing-art-prayer-encounter.com/uploads/1/3/1/6/131606435/worag.pdf
    • http://files.queencityproam.com/uploads/1/3/0/9/130969633/weneg-jogidogedi-davolafajedel.pdf
    • https://cdn.shopify.com/s/files/1/0430/2487/5674/files/zakovuwa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0044/7655/files/mavaxuvoli.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mulobovapu.pdf
    • https://cdn.shopify.com/s/files/1/0434/6806/2872/files/54187221808.pdf
    • https://cdn.shopify.com/s/files/1/0427/4506/9724/files/vuvafinoxotekel.pdf
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/34688828586.pdf
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/62754479643.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/47546880491.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/2474199436.pdf
    • https://cdn.shopify.com/s/files/1/0430/6213/2897/files/gupadomewebepagi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/popubaliluteraworesusen.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e3.bin
e3c99cc4471d625c685d3017d4b5cf65a358a749151b82f99c1f5371d1b72d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E3 5248 bytes
font_01_sfnt_off0000f3be.bin
941229285f15a6d869577fd47c2681dec60b3bfa4a75271401aec73442632cad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BE 10260 bytes

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