Malicious PDF — malware analysis report

Static analysis result for SHA-256 799234bffca71a4c…

MALICIOUS

PDF

48.2 KB Created: 2020-08-14 22:11:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f457b2d9c5cdb1ff4b0b3806d5a677cf SHA-1: 04ed9dac55c994e6afaf8d00bf44cf78e184ea2f SHA-256: 799234bffca71a4c14a614882362bc64cdb96fd8bd436448aaaff410945d5207
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically a URL related to a 'cookbook recipe page template'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDF files hosted on various domains, suggesting a link farm or SEO poisoning attempt. The primary malicious URL is https://ttraff.cc/pify?keyword=cookbook+recipe+page+template, which likely serves as a lure to a malicious payload or phishing page.

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=cookbook+recipe+page+template
    • http://files.979harrisville.org/uploads/1/3/1/3/131381612/179916.pdf
    • http://ramim.spearstyle.com/uploads/1/3/1/4/131408100/nepemafaloro-pemafekamimij-mixafabilu.pdf
    • http://gusomiruj.zeydarsantana.com/uploads/1/3/0/7/130774993/293974.pdf
    • http://files.danamsd.com/uploads/1/3/1/1/131164402/bonawojano_zejetev.pdf
    • http://files.meghanbarnesrd.com/uploads/1/3/1/3/131379325/taruta-fazisixelizixe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/0577/9863/files/22844747305.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/tukisajuxoxufowodipoduj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/90676671352.pdf
    • https://cdn.shopify.com/s/files/1/0434/9516/2022/files/bulletproof_diet_smoothies.pdf
    • https://cdn.shopify.com/s/files/1/0431/1721/5905/files/61438166720.pdf
    • https://cdn.shopify.com/s/files/1/0440/7836/6885/files/angostura_bitters_drink_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5394/8836/files/68665984352.pdf
    • https://cdn.shopify.com/s/files/1/0433/0808/9509/files/role_of_biotechnology_in_food_industry.pdf
    • https://cdn.shopify.com/s/files/1/0428/3141/3404/files/sanijatotapezanemo.pdf
    • https://cdn.shopify.com/s/files/1/0439/7072/3998/files/vuxituru.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000726a.bin
3d9845d1056df792f1b1235b73097e40bab74605e2a333ac04367ab2cc83461e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x726A 4984 bytes
font_01_sfnt_off00008361.bin
dcc563d02fc4bc3b7ab5bc4d10edefd8def7edbdeafdbb05ad835e187143a72a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8361 10060 bytes
font_02_sfnt_off0000a5d8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5D8 4324 bytes

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