Malicious PDF — malware analysis report

Static analysis result for SHA-256 0723a974f338d1a6…

MALICIOUS

PDF

52.7 KB Created: 2020-08-05 05:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ad5cbde29b13b399fef7975e58ac2ce SHA-1: fd30bb9a7a365609d9d4abd00bebd71e3a7c317b SHA-256: 0723a974f338d1a62281fd8832ce6c1b9326987d02cab8310cb26194991ccfca
162 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 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a potential link farm or SEO manipulation tactic to obscure the malicious redirector. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=annexure+e1+for+hssc+pdf
    • http://files.omnigrpinc.com/uploads/1/3/1/8/131871739/4031d05.pdf
    • http://files.gaindetalks.com/uploads/1/3/1/4/131437444/kexoloxunaxas-wofizeve-kutari.pdf
    • http://files.ragandboneprojects.org/uploads/1/3/1/4/131437147/5653229.pdf
    • http://files.jmsupplyga.com/uploads/1/3/1/6/131637853/3808439.pdf
    • http://files.ambassadorsofnature.com/uploads/1/3/2/3/132302718/5731939.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/zonalokubepabujevi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/revit_architecture_sample_projects.pdf
    • https://cdn.shopify.com/s/files/1/0434/0213/3656/files/wawagupupebutanebu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/48200568997.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/3846222055.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2131/files/web_2_converter_chrome.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/brazil_date_format.pdf
    • https://cdn.shopify.com/s/files/1/0432/9180/3801/files/petufunigukifovomunabiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/7923/6773/files/27771919315.pdf
    • https://cdn.shopify.com/s/files/1/0436/9799/5941/files/turaz.pdf
    • https://cdn.shopify.com/s/files/1/0429/0831/9903/files/10_pound_mud_snapper.pdf
    • https://cdn.shopify.com/s/files/1/0440/2007/2613/files/vafozupikizobir.pdf
    • https://cdn.shopify.com/s/files/1/0435/9585/8083/files/albert_schweitzer_books.pdf
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/28206004956.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://www.geocities.com/mitra_anirban/hobbies.htmGNU
    • http://www.gnu.org/copyleft/gpl.htmRegular

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000615a.bin
1c776a83e8cf3511103db06aae5935366dede6bec9e2ef0cf4c94dc04fb6f373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x615A 5108 bytes
font_01_sfnt_off000072c7.bin
b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C7 3720 bytes
font_02_sfnt_off00007e2a.bin
6a73c83e8acf21d1cde46da2c4c7cfdf1c5289039d4686b793116495c27b31ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2A 12464 bytes
font_03_sfnt_off0000a6bb.bin
ebec03bd87911af594788a89cd6906097929a956808f6d2e968359e263ed975a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA6BB 9412 bytes

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