Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceda7273da9b9e7e…

MALICIOUS

PDF

40.2 KB Created: 2020-08-20 06:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32c81086c662816488d503aacd7c64d9 SHA-1: eae612daf8416eb756291d038a36a026d85372c5 SHA-256: ceda7273da9b9e7e0c56c53783be20d926f31d224c409fc47370a96128d1895f
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a large number of external links, many hosted on Shopify. One of the primary links redirects to a known malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=ring+structure+formation+of+glucose, which is a known malicious redirector. The presence of numerous links suggests an attempt to manipulate search engine results or distribute further malicious 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.com/pify?keyword=ring+structure+formation+of+glucose
    • http://files.genevieve-simon.com/uploads/1/3/0/8/130814118/5883876.pdf
    • http://files.hoxton253.com/uploads/1/3/0/9/130969185/woretugiraw_jafulas_xabomokef.pdf
    • http://wavazixag.freshexpressionsllc.com/uploads/1/3/0/7/130738854/buvafufelepofe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/kiropip.pdf
    • https://cdn.shopify.com/s/files/1/0435/1796/8536/files/1000_palabras_en_ingles_traducidas.pdf
    • https://cdn.shopify.com/s/files/1/0437/1772/2280/files/pilevonemipiramafejit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/motorcraft_oil_filter.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/norojakibi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/fubasoropifofujemuda.pdf
    • https://cdn.shopify.com/s/files/1/0448/1767/8497/files/3._1_diagnostico_de_la_stps.pdf
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/26794546763.pdf
    • https://cdn.shopify.com/s/files/1/0450/2025/0262/files/lista_de_aditivos_alimentares.pdf
    • https://cdn.shopify.com/s/files/1/0437/7840/8609/files/metabolism_of_toxicants.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/marcy_home_gym_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/48336412937.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/31091728899.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_off00005de6.bin
cd56f50a1184c18288f5f10498ef0228bb838462ad44925cd87d5882ced37b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DE6 5208 bytes
font_01_sfnt_off00006f8c.bin
bc714716f5c022cada24f37d6a359fdd5d73da352c99651b7b48a8e2f0a33a21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F8C 10652 bytes

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