Malicious PDF — malware analysis report

Static analysis result for SHA-256 efafffd1a296ec12…

MALICIOUS

PDF

43.8 KB Created: 2020-08-12 06:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ceb4a1da0b678bac7c173c4d6d28359b SHA-1: 6bc476adce543dc6cdbbfc90147512d9f0cc845e SHA-256: efafffd1a296ec1236d60cd7a753b79ea69d1ef348082d0e2585c71df2c06474
154 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as 'Vanguard retirement planning pdf'. This link, `https://ttraff.com/pify?keyword=vanguard+retirement+planning+pdf`, is designed to lead users to potentially harmful content. The document also hosts a large number of other PDF links, many hosted on Shopify, suggesting a link farm or SEO poisoning tactic to improve search engine visibility for 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=vanguard+retirement+planning+pdf
    • http://talus.paganscrapbooksupply.com/uploads/1/3/0/8/130874153/091429.pdf
    • http://files.yieldproagronomyllc.com/uploads/1/3/0/7/130740490/0cdfd0a2e375ee9.pdf
    • http://files.wineriesonbetzoldroad.com/uploads/1/3/0/7/130775506/xejeres.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8135/files/79299194443.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6463/files/miwezafedekorisabaduzum.pdf
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/74909881550.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/wovogi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7668/0870/files/ciclo_de_vida_de_uma_angiosperma.pdf
    • https://cdn.shopify.com/s/files/1/0436/6997/9289/files/leave_application_format_for_office.pdf
    • https://cdn.shopify.com/s/files/1/0448/6584/7458/files/canon_mp250_driver.pdf
    • https://cdn.shopify.com/s/files/1/0432/3845/7508/files/wewujakujupigemo.pdf
    • https://cdn.shopify.com/s/files/1/0447/5571/4199/files/tovuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/11526943382.pdf
    • https://cdn.shopify.com/s/files/1/0440/0765/3526/files/the_normal_bacterial_flora_of_humans.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/90646530885.pdf
    • https://cdn.shopify.com/s/files/1/0427/4218/6150/files/54217021498.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/mikol.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_off00006c8f.bin
2b2064e67360e088444c407e60eb91f5bf6e24e04bafeb528385aecbe43c069b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C8F 5148 bytes
font_01_sfnt_off00007dff.bin
f77c93a8b7b3a0f2804c5d6a9ba7ac3dd7126b919d5709edde76e8e60629b29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFF 10504 bytes

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