Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da3f770ecab99f6…

MALICIOUS

PDF

49.8 KB Created: 2020-08-23 23:58:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c05ccf8ed162f1af8407f61233183f21 SHA-1: 0a470fa2a1c54de78ea316e4d94a4cbf5d02ea64 SHA-256: 5da3f770ecab99f6d36cd8c4abbab39d83de8fe9fa98397ab872b7e5bc71a4dc
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=boat+browser+for+android+apk', is flagged as a malicious redirector. The document body and heuristics indicate a lure to download an Android browser, likely a pretext for delivering a malicious payload. The presence of numerous Shopify links suggests a link farm used to obscure the malicious destination.

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.com/pify?keyword=boat+browser+for+android+apk
    • http://files.stavangerfitness.com/uploads/1/3/1/3/131379980/8f793beae2e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/7764/1116/files/hitman_contracts_chets.pdf
    • https://cdn.shopify.com/s/files/1/0433/2729/1544/files/kubivukegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/lic_payment_receipt.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/besame_mucho_jazz_piano.pdf
    • https://cdn.shopify.com/s/files/1/0437/8827/1777/files/nixapag.pdf
    • https://cdn.shopify.com/s/files/1/0447/0875/7660/files/wujarisul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9114/9471/files/nvidia_graphics_card_performance_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/8774/1607/files/15652174428.pdf
    • https://cdn.shopify.com/s/files/1/0431/4769/0145/files/nccn_guidelines_breast_cancer_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3286/files/88108979850.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_off00006020.bin
5881d1baf559159f28cb256af2455348c2f62d436db211100df9bc84dfa547b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6020 5136 bytes
font_01_sfnt_off000071ae.bin
5c4b8c3414385275a57cabda909edb53e166da46fb02062e278d60b02b82bc9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71AE 11256 bytes
font_02_sfnt_off00009760.bin
e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9760 16092 bytes
font_03_sfnt_off0000ac28.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC28 4324 bytes

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