Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e63d18ef9fa6eee…

MALICIOUS

PDF

36.1 KB Created: 2020-08-11 23:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0128eda3be428ad3f3e87537840e2052 SHA-1: ed37c00a3dde152b2f2b23b5009c155b984a22c9 SHA-256: 6e63d18ef9fa6eee5f557e45de86749f327208ec7b0736068a039542aea0e6cd
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'sheet music' and the malicious URL, suggesting a lure. The presence of a link farm and a critical redirector firing indicates a high likelihood of malicious intent to redirect users to harmful content.

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/wb?keyword=christmastime%20is%20here%20sheet%20music%20pdf
    • http://nakurure.invention-info.com/uploads/1/3/1/8/131857920/jezugajapabawanima.pdf
    • http://numadavo.gaprx340b.com/uploads/1/3/0/8/130814674/pusefujejuvabe-nalokaz-xabefojovibumuj.pdf
    • http://files.diamonddashmealprep.com/uploads/1/3/0/9/130969334/854422.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/1743/6327/files/volepuwuxevabiwi.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/60146195638.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/futosinub.pdf
    • https://cdn.shopify.com/s/files/1/0437/8922/2037/files/pijeworetafoxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/lipejopebeseworuvekazusez.pdf
    • https://cdn.shopify.com/s/files/1/0432/9704/6696/files/jorefatisifofetira.pdf
    • https://cdn.shopify.com/s/files/1/0446/6016/2713/files/sokibagokureruzaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/roginodiborobipexirekazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/xudowarokidegawewetesuje.pdf
    • https://cdn.shopify.com/s/files/1/0429/6255/0940/files/51878922872.pdf
    • https://cdn.shopify.com/s/files/1/0433/5511/1589/files/ropegaguvelujabijupof.pdf
    • https://cdn.shopify.com/s/files/1/0438/4332/2016/files/81946194097.pdf
    • https://cdn.shopify.com/s/files/1/0431/8458/6903/files/tasofezobejepezetalaweni.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_off00004f30.bin
080cfc14839de816389edc42234bf3c99289a68a8e15d26e0c8e7564edad8e4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F30 5268 bytes
font_01_sfnt_off000060f2.bin
b5f7f59e611357c159c64d2f7cdeacb8dcff75468c70b6f30e833da90ee09557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F2 10136 bytes

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