Malicious PDF — malware analysis report

Static analysis result for SHA-256 3076e3f9b10524d0…

MALICIOUS

PDF

61.9 KB Created: 2020-08-06 10:42:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20f28c5150c6bd2abb36aa3fc5c3bd2f SHA-1: 56944d9580b1cdaad32e4e4efc08ea084daf5bc0 SHA-256: 3076e3f9b10524d0a01b740e3042c0cb0f85fb60e81c326d9f4cb87c3890c145
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to what appears to be a link farm hosted on Shopify, with a critical redirector link to 'ttraff.cc'. This suggests a tactic to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious. The presence of numerous external links, including a malicious redirector, indicates the primary purpose is to redirect the user to potentially harmful 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.cc/pify?keyword=derivative+formulas+list+pdf
    • http://files.sacredvesselacupuncture.com/uploads/1/3/2/7/132741385/2052792.pdf
    • http://files.tprb1023fm.com/uploads/1/3/1/4/131453299/322463bd2995e27.pdf
    • http://files.thothfantasyquests.com/uploads/1/3/1/4/131407655/e12bed2.pdf
    • http://files.wssbadminton.com/uploads/1/3/2/6/132682813/8015971.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/antibiotic_resistance_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/73264599746.pdf
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/59880566503.pdf
    • https://cdn.shopify.com/s/files/1/0435/4323/2661/files/canzonetta_spagnuola_rossini.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/13630226941.pdf
    • https://cdn.shopify.com/s/files/1/0433/7080/7459/files/pivesu.pdf
    • https://cdn.shopify.com/s/files/1/0437/8496/2200/files/buwuxozenoluwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7829/5450/files/55138741277.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/baby_boy_names_telugu.pdf
    • https://cdn.shopify.com/s/files/1/0440/0067/3950/files/60312965893.pdf
    • https://cdn.shopify.com/s/files/1/0434/1861/5975/files/diablo_2_1._14d_resolution.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008022.bin
1171ebb6e421d51c9f08e7d63ac026c339fed3174f276124555debc669dcd763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8022 5020 bytes
font_01_sfnt_off00009141.bin
64baf916c6dbdc88ea9a6ddddac1183517e3b3580fc0a5aa434b1d444d65e5d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9141 17116 bytes
font_02_sfnt_off0000c6ce.bin
66d8f1cb48feb19836d634d59f31f50fe2dec8e1a71d277953be21107f72bd1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6CE 16244 bytes
font_03_sfnt_off0000dc43.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC43 4324 bytes

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