Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f30ec7df0e40c3…

MALICIOUS

PDF

43.4 KB Created: 2020-08-20 09:13:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b64201bb3ac257370254134aeaeec4df SHA-1: e83193f77cb125cc4a244ca5b1b220af3c44b77c SHA-256: 11f30ec7df0e40c3ef5d3050fed7cb787ef4ebac20c9b1d423085c11a3812a96
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.ru/pify?keyword=giza+cotton+sheet+sets', is identified as a malicious redirector. This indicates the document's primary purpose is to redirect users to potentially harmful sites, likely for phishing or malware distribution. No scripts were extracted, but the presence of numerous links and the malicious redirector strongly suggest a malicious intent.

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.ru/pify?keyword=giza+cotton+sheet+sets
    • http://files.magistrasolomon.org/uploads/1/3/0/8/130873983/gixopora-wijikiwiratobok.pdf
    • http://files.teamstudy.org/uploads/1/3/0/7/130775257/2895106.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0450/1841/5254/files/vakajenuzebijowoposete.pdf
    • https://cdn.shopify.com/s/files/1/0431/8085/1364/files/kulopozofemuniv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7400/2848/files/xanapulapogukuluwebot.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/72866363379.pdf
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/migewuxowepa.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/xudapel.pdf
    • https://cdn.shopify.com/s/files/1/0440/6912/6309/files/kevomagil.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/24012860222.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8242/files/83045178167.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/50810454614.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4651/files/64880405718.pdf
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/kitegikum.pdf
    • https://cdn.shopify.com/s/files/1/0434/4155/3575/files/cyclone_baby_bash.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006db8.bin
023fab500101cb8a1fa78cac462850a4843d5d9ce8ee1a06f9e4498958de89c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB8 4840 bytes
font_01_sfnt_off00007e35.bin
d83a85cba965d8805c240240ab7629f8cfb5e95860cf863f50c9739b263f55f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E35 10288 bytes

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