Malicious PDF — malware analysis report

Static analysis result for SHA-256 f356d1debfde0179…

MALICIOUS

PDF

45.7 KB Created: 2020-08-19 09:48:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: df9eda7eb22de705ae11a0656c868662 SHA-1: 586f74925f1c285f7ef0fa88a3610b859748c3ba SHA-256: f356d1debfde0179f945a1440d265a4c6c7c011822f2b779aadb9e93b0a5d67f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a 'Florida boat bill of sale template'. The PDF also features a link farm with numerous external links, many hosted on cdn.shopify.com, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier strongly indicates 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.ru/pify?keyword=florida+boat+bill+of+sale+template
    • http://xiraz.whirlpoolservicecenter.net/uploads/1/3/0/8/130813765/povudela.pdf
    • http://files.yourmasjidyusufshah.com/uploads/1/3/0/7/130739116/5298689.pdf
    • http://gekebelap.lakecitysecondary.com/uploads/1/3/1/3/131379174/xosulatofemiket.pdf
    • http://files.dannypics.com/uploads/1/3/0/9/130969172/wufadojuwabo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/levidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/xusogogifep.pdf
    • https://cdn.shopify.com/s/files/1/0435/6263/1326/files/dieta_cetogenica_menu_50_dias.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/53566299760.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/tabuxalonizilud.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5965/files/23327930580.pdf
    • https://cdn.shopify.com/s/files/1/0439/1269/1867/files/project_plan_template_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/30480553560.pdf
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/52668986286.pdf
    • https://cdn.shopify.com/s/files/1/0438/0780/1504/files/jevifufimoxav.pdf
    • https://cdn.shopify.com/s/files/1/0453/3600/2715/files/7630088770.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/69843072863.pdf
    • https://cdn.shopify.com/s/files/1/0438/4368/2469/files/24773934076.pdf
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/7358923685.pdf
    • https://cdn.shopify.com/s/files/1/0429/1536/5031/files/7400168276.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_off00007403.bin
6297c79282732e22c822cc8a836ae1b862597511171ef841be9ed99c35297365		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7403 5280 bytes
font_01_sfnt_off000085dc.bin
ee1e0d8535d438c040fb7be9dad56fadd4652f309681944022bd6285f5592344		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85DC 10416 bytes

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