Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba9b94c7d194879…

MALICIOUS

PDF

40.4 KB Created: 2020-08-09 18:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30bbd3931bc0b5df9579a661a3a8b6c7 SHA-1: 74d6016f5f032763852b78243aefbfe670fd64f5 SHA-256: eba9b94c7d194879fd3b5c300217be57542abb7e55bdd27d11e77e0e82962369
152 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though partially corrupted, contains text related to a book download and the malicious URL, suggesting a social engineering lure. The primary attack vector appears to be directing users to malicious infrastructure via a deceptive link.

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=bikhre+moti+full+book+free+download+pdf
    • http://jefatu.openboxm.com/uploads/1/3/0/7/130776031/3323377.pdf
    • http://xatisisis.electroskan.net/uploads/1/3/2/7/132740900/jawiri.pdf
    • http://files.morethanmeds.com/uploads/1/3/1/6/131606027/8902634.pdf
    • http://files.beautifulcardcompany.com/uploads/1/3/0/8/130814926/verolasibufagu_bizidomusoru.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95610310087.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/91847949936.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/miparimuziv.pdf
    • https://cdn.shopify.com/s/files/1/0431/7996/6628/files/xojudanobafubadojerifegok.pdf
    • https://cdn.shopify.com/s/files/1/0431/3209/2573/files/circuits_2nd_edition_ulaby_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kenetawibonilolususede.pdf
    • https://cdn.shopify.com/s/files/1/0436/6221/3273/files/1952121555.pdf
    • https://cdn.shopify.com/s/files/1/0432/8118/6971/files/sitotakotifomedu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/7550142799.pdf
    • https://cdn.shopify.com/s/files/1/0433/0425/5656/files/purilefaratukegig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdf
    • https://cdn.shopify.com/s/files/1/0433/6196/0091/files/2237078114.pdf
    • https://cdn.shopify.com/s/files/1/0433/9014/0572/files/acidos_organicos.pdf
    • https://cdn.shopify.com/s/files/1/0428/0628/0355/files/padorif.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_off00005230.bin
e1d8832e10ea0902b378d2ea1f9ab04b0e280c81c6e2641056383cba1c6fe6be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5230 5332 bytes
font_01_sfnt_off0000642b.bin
11f93f3b801565b0b62489936c153eff6fdd37d14ce119467985739be1411505		 pdf-font-stream PDF embedded font (sfnt) at offset 0x642B 9924 bytes
font_02_sfnt_off00008640.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8640 4324 bytes

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