Malicious PDF — malware analysis report

Static analysis result for SHA-256 34bbc2a709d8c476…

MALICIOUS

PDF

39.3 KB Created: 2020-08-03 16:56:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1d43292c8b33da1a5eeffb7e6bc7452 SHA-1: 58168eec2084ffa88729d1b20d9be1a25a14a658 SHA-256: 34bbc2a709d8c47679cb62e2afbc7a07f3888d8067759759705e06dc80c1b4de
152 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, embedding a large number of external URLs, many of which are hosted on Shopify. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=content+analysis+example+pdf'. The primary purpose appears to be to distribute a high volume of links, potentially for SEO manipulation or to obscure malicious destinations. The ML classifier strongly supports the malicious verdict.

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=content+analysis+example+pdf
    • http://files.the-gym.org/uploads/1/3/0/7/130775493/5ff0292e3.pdf
    • http://files.clarencecoastdbclub.com.au/uploads/1/3/0/8/130874482/vurivemen.pdf
    • http://files.deborahjonesdesign.com/uploads/1/3/0/7/130776661/xedamasexegi_zovisale_mubomepomo_jolizodi.pdf
    • https://cdn.shopify.com/s/files/1/0441/2702/7352/files/basel_3_document.pdf
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/sizejumuxumud.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/47317664089.pdf
    • https://cdn.shopify.com/s/files/1/0437/6333/5326/files/48682675405.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1734/files/tony_robbins_awaken_the_giant_within.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/vipizunolixafadi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7643/5621/files/factorio_steel_smelting.pdf
    • https://cdn.shopify.com/s/files/1/0437/8394/6401/files/insomnia_vs_postman.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_off00005cfa.bin
7806489a445376c3e24f5a7d842f8b3c6f441598bffeb1aa50375817aa3f47b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFA 5168 bytes
font_01_sfnt_off00006e90.bin
f6ec8055640b4ede09f2eb1b8e2dd926e46b1d7100e50e971615dab1935d0edb
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E90 10072 bytes