Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b23879a4e5b2960…

MALICIOUS

PDF

35.5 KB Created: 2020-08-07 13:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce7d82b2938b9c6597ce04806126e677 SHA-1: dd3634a8344423876332d8fb16ef61f72f0da1d4 SHA-256: 8b23879a4e5b296091d2807dca002566898088460ff41fceb718faf7de3f42fe
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify, designed to appear as legitimate PDF downloads. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'ttraff.cc', which is used to disguise the ultimate destination. The document body text, though partially corrupted, includes the target keyword 'Archaeology essentials 3rd edition pdf download' and the malicious URL, reinforcing the lure.

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=archaeology+essentials+3rd+edition+pdf+download
    • http://files.hawaiistuco.com/uploads/1/3/1/8/131871642/kasezofakeji_paliluwubezol_volodozo_bafim.pdf
    • http://jozuboj.cvqgvt.org/uploads/1/3/1/4/131453990/bopepodinane_fokizik.pdf
    • http://files.mypdxlifecoach.com/uploads/1/3/0/7/130739648/xesavome.pdf
    • http://files.dinas-decor.com/uploads/1/3/1/6/131637014/pizazexon_jomuxakura_fosukafuk.pdf
    • https://cdn.shopify.com/s/files/1/0429/6232/1567/files/materialismo_cultural.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/nobuvufisazibasutajalibub.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/nozigiwapatafa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4818/1666/files/54772957932.pdf
    • https://cdn.shopify.com/s/files/1/0433/8935/4149/files/49340790733.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/lorovukolefepazoxupumur.pdf
    • https://cdn.shopify.com/s/files/1/0435/7714/7547/files/27512906622.pdf
    • https://cdn.shopify.com/s/files/1/0427/3651/7286/files/22103929532.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/valid_us_addresses.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/61396565589.pdf
    • https://cdn.shopify.com/s/files/1/0429/2539/2035/files/11th_grade_chemistry_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9535/files/82226444154.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0678/files/34768036152.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_off00004bf8.bin
236930f128b6d25c37ab0ad1dd7f11d916ef44ffe1ccd0b208764bad354585bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF8 5764 bytes
font_01_sfnt_off00005fae.bin
fde3fbf4ef584d4e083d45bf2169dd85e2ce5b8971f7001473308613463dc2e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAE 9680 bytes

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