Malicious PDF — malware analysis report

Static analysis result for SHA-256 7324411a83b25c2c…

MALICIOUS

PDF

67.6 KB Created: 2020-08-30 23:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 367df36e4f5f7e56858b628fd6f108ab SHA-1: e3e2f59f72a384b3716d99df7fca82ac1e3e2cab SHA-256: 7324411a83b25c2c318ff10448437506db0a0be80c401d5d70870979ae17b744
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'https://ttraff.cc/wix?keyword=hentai+ranma+1+2'. This indicates an attempt to lure the user to a harmful site. The presence of numerous other PDF links, many pointing to benign content, suggests a link farm or SEO manipulation tactic. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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/wix?keyword=hentai+ranma+1+2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/cb2bed_76e2809a84c3483d8db15988a7c03a25.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c131cd4cbad45bc85f6eeee93fa6c88.pdf
    • https://static.usrfiles.com/ugd/b8c837_b6c190f4b6494997a8f83f845ef1045a.pdf
    • https://cdn.shopify.com/s/files/1/0438/0711/3373/files/51275879319.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/geguvijanozibovix.pdf
    • https://cdn.shopify.com/s/files/1/0464/7701/7238/files/99338488511.pdf
    • https://static.usrfiles.com/ugd/b8c837_308bbcb111da4e6ebd05f5c33c41ef21.pdf
    • https://static.usrfiles.com/ugd/16a96a_a4ad52c6c21a4482a797f0b71a9364da.pdf
    • https://cdn.shopify.com/s/files/1/0430/4053/8773/files/gadafuzepojot.pdf
    • https://cdn.shopify.com/s/files/1/0429/7680/5023/files/72793693520.pdf
    • https://cdn.shopify.com/s/files/1/0435/3631/8616/files/nukelabak.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/varuxarope.pdf
    • https://cdn.shopify.com/s/files/1/0429/3473/0911/files/xazivofepura.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009303.bin
6bf1e4c6f77ea40efdb9c272a9f7131c0c37d3003c77f59d86cb68bfee2bedad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9303 7472 bytes
font_01_sfnt_off0000ac7d.bin
538420239311f24d05c86311980439caef7cd71592906527ee0187f9285f7c98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7D 4764 bytes
font_02_sfnt_off0000bc97.bin
d8d18ec992ed088e617f6660979292826039e53d187372a35e5e285f46344633		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC97 15332 bytes
font_03_sfnt_off0000ec54.bin
60f53b17f7925ac1818ac9336ea58fd206fea48872b5377b70e6fb8114080afd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 16132 bytes

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