Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3c44fad07f07ba…

MALICIOUS

PDF

56.6 KB Created: 2020-08-24 01:01:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2202da261be4b8ff63f3974b21f0a170 SHA-1: 3053032dc6747f4f3dfeade97fb5bb1457c04803 SHA-256: 9b3c44fad07f07babbadfe084239e17529d138602d698ce0a2e808c3be82607e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic identifying it as a malicious redirector pointing to 'ttraff.com'. Another heuristic flags it as a link farm, with many links hosted on 'cdn.shopify.com'. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the same redirect URL, suggesting the primary purpose is to lure users to malicious sites.

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=alpha+helix+and+beta+sheet+video
    • http://files.executived-daytours.com/uploads/1/3/1/8/131856852/4921679.pdf
    • http://gafino.melaniebartelart.com/uploads/1/3/0/8/130873826/podifekobodin.pdf
    • http://gateban.changinglungcancer.com/uploads/1/3/1/3/131398406/moronuz_gexiruxeritawuk.pdf
    • http://files.danieldavey.net/uploads/1/3/1/3/131379503/4096789.pdf
    • https://cdn.shopify.com/s/files/1/0439/2668/3816/files/bomemudijizerexika.pdf
    • https://cdn.shopify.com/s/files/1/0454/2604/9182/files/metabolism_of_amino_acids_biochemistry.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/vanquishers_sword_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0432/3888/3485/files/85376120332.pdf
    • https://cdn.shopify.com/s/files/1/0463/2120/5405/files/3056570661.pdf
    • https://cdn.shopify.com/s/files/1/0428/7037/4566/files/48544221181.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/zonesipotufuwivavalano.pdf
    • https://cdn.shopify.com/s/files/1/0456/4857/6679/files/aashiqui_2_songs_all_remix.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/20416569062.pdf
    • https://cdn.shopify.com/s/files/1/0435/6780/8667/files/58603195479.pdf
    • https://cdn.shopify.com/s/files/1/0443/6181/0076/files/48645819809.pdf
    • https://cdn.shopify.com/s/files/1/0450/0901/0852/files/medical_terminology_pronunciation.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_off00009ef3.bin
157bd749a97af417b3e33f8a8acb5dab7d46f7e66684597e9e9015dc4bb995a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF3 5208 bytes
font_01_sfnt_off0000b09c.bin
78e52df881c450186af4ebde696d181e6ea11a8186effe8716984d667e48ac50
pdf-font-stream PDF embedded font (sfnt) at offset 0xB09C 10620 bytes