Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7639dce445ea4a2…

MALICIOUS

PDF

41.1 KB Created: 2020-08-26 19:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0aa400b8a50d349c4788812bbcb771c SHA-1: 760d16e53a2a4b4f42471dff1aa35d3241737aa5 SHA-256: b7639dce445ea4a263e751aebc65394750578e9e494276c4eb18409c8d36b339
150 Risk Score

Malware Insights

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

The PDF contains a prominent link disguised as a movie download, which is a common social engineering tactic. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic confirms this link points to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, likely to obscure the malicious destination. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.me/pify?keyword=doctor+strange+full+movie+in+hindi+h
    • http://files.osweetnature.com/uploads/1/3/1/3/131398322/fe87a413232382.pdf
    • http://rurab.erikahope.com/uploads/1/3/0/7/130775734/vijomapuzo-warad.pdf
    • http://files.lemonbalmchronicles.com/uploads/1/3/0/7/130775373/rubexibigoxames-xejatom.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8986/files/namevobavop.pdf
    • https://cdn.shopify.com/s/files/1/0429/2401/5783/files/nogekufoxup.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/22853147384.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/tikaxatikatepiropo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5732/2903/files/fisozowuladuxewosufoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/10588857949.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/cerebral_arteriovenous_malformations_veins.pdf
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/sony_dream_machine_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/9439/2485/files/suzuki_budismo_zen.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/65934232845.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062cf.bin
e05f57e5e060e57d65ee576001312c74edd9798640a0a46f2ee79598da40905c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62CF 5492 bytes
font_01_sfnt_off00007557.bin
36d171ae1ac2ed312c72747e98273a680f83495b3a6b9a2dd71bfafb98fc1b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7557 10060 bytes

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