Malicious PDF — malware analysis report

Static analysis result for SHA-256 00dea0f96349beeb…

MALICIOUS

PDF

48.4 KB Created: 2020-07-27 03:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0e6983bcfe866d9d053fcbbc61f4fb7d SHA-1: b02a390c77115529388a476b273e4f1e7a7f9aee SHA-256: 00dea0f96349beeb5fbb2c27f4188a545314e2627bb9106588cb08c2ff3ac1d1
154 Risk Score

Malware Insights

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

The PDF file contains embedded links that redirect to a known malicious URL, specifically 'https://ttraff.ru/pify?keyword=java+programming+examples+for+beginners+pdf'. This URL is part of a link farm designed to lure users with seemingly legitimate search terms. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this PDF is used for malicious redirection.

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=java+programming+examples+for+beginners+pdf
    • http://files.wendybrockman.com/uploads/1/3/1/4/131409463/zipizozezakowa_savaruroluseg.pdf
    • http://files.dylankcmac.com/uploads/1/3/1/4/131408572/tawikum.pdf
    • http://files.pinehavencamp.org/uploads/1/3/1/3/131398278/sujimexijojejeluj.pdf
    • http://files.uintapreparations.com/uploads/1/3/1/4/131407029/wiwipinij.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nedodakamilutejevojive.pdf
    • https://cdn.shopify.com/s/files/1/0438/8611/7019/files/463630227.pdf
    • https://cdn.shopify.com/s/files/1/0437/8705/9352/files/wuvifimiregezule.pdf
    • https://cdn.shopify.com/s/files/1/0432/9914/3838/files/vepekuta.pdf
    • https://cdn.shopify.com/s/files/1/0435/5181/7883/files/36808860858.pdf
    • https://cdn.shopify.com/s/files/1/0437/9816/7713/files/62177396420.pdf
    • https://cdn.shopify.com/s/files/1/0428/9213/2508/files/41376607918.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4006/files/rudaronerex.pdf
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/butupolifamoxigogu.pdf
    • https://cdn.shopify.com/s/files/1/0434/2012/3293/files/55469182257.pdf
    • https://cdn.shopify.com/s/files/1/0437/9305/5904/files/67549346934.pdf
    • https://cdn.shopify.com/s/files/1/0428/5480/9756/files/54287856069.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/laxegeke.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_off00007e76.bin
738856bbae6c217829e8f477f4a84688d1f20f18b4979f4641124cf7abb759ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E76 5324 bytes
font_01_sfnt_off0000906f.bin
a0f0e17b33a89f9bc2fd1175195b2d34197e0d4b28377facac5e7a933b468729		 pdf-font-stream PDF embedded font (sfnt) at offset 0x906F 10392 bytes

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