Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddd63ce26cf2e34…

MALICIOUS

PDF

39.3 KB Created: 2020-08-03 16:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11fee629d7ce4b37d3b9038de7bf70ec SHA-1: a2b01d8416e5da938478d82ecdd915a40e95cf32 SHA-256: bddd63ce26cf2e349a239d023c19ecaba3364e9ac7c4c6100a5ca7a089e7556f
152 Risk Score

Malware Insights

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

The PDF contains a link farm designed to mimic search engine results, directing users to a malicious redirector at 'https://ttraff.ru/pify?keyword=antenna+and+wave+propagation+by+bakshi+pdf+free'. This tactic is commonly used to distribute malware or conduct phishing attacks. The ML classifier strongly supports the malicious nature of this PDF.

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=antenna+and+wave+propagation+by+bakshi+pdf+free
    • http://files.rhondaleannestock.com/uploads/1/3/2/6/132682686/3619471.pdf
    • http://files.luebtowj.com/uploads/1/3/1/4/131454696/kuxowi-xitafupuxipana-vobomerul-fowixakajad.pdf
    • http://files.empirepanj.com/uploads/1/3/0/7/130775831/6678807.pdf
    • http://files.healingjourneyhypnotherapy.com/uploads/1/3/0/8/130813663/limexo_tuzefikejunuzaw_zujafo_sugoperad.pdf
    • https://cdn.shopify.com/s/files/1/0436/4579/6512/files/wazidubedofezagomuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2031/2991/files/wejatozi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/gavozitapisavukufamumu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/patewu.pdf
    • https://cdn.shopify.com/s/files/1/0439/7367/3118/files/36268657313.pdf
    • https://cdn.shopify.com/s/files/1/0449/9865/6158/files/star_trek_technical_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/71149248476.pdf
    • https://cdn.shopify.com/s/files/1/0433/7496/8997/files/barosagotek.pdf
    • https://cdn.shopify.com/s/files/1/0431/3595/9191/files/mad_catz_rat_7.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/jazupiduvesijakukuzituv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/72375204645.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000433c.bin
f2b72033dfb79822d5a79f68a5b73b53c36d09b0451f1cd55dbd2bfdeaed159b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x433C 5716 bytes
font_01_sfnt_off000056d2.bin
22032c6ec2e66fd7136c30b36b7a4f0f1a4e2e1bd70be8292dc148387310f876		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56D2 9444 bytes
font_02_sfnt_off0000772f.bin
9df8c40fc6fd7f680bf2a887f80a733806ef0ef3253ead95262a0588c735ede2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772F 16580 bytes

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