Malicious PDF — malware analysis report

Static analysis result for SHA-256 eacdb2b9001592a9…

MALICIOUS

PDF

43.6 KB Created: 2020-08-14 03:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15779577b5cce9ea0bec834e45c91542 SHA-1: f65ee64f4e61f6fd8e6ec422c4e99ae9ff0b2dd5 SHA-256: eacdb2b9001592a9d6d37d17eb263eb8d03e0d07363b9586f2e0a51ad2dea7ea
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, contains text suggesting it is a 'free powerpoint template slide carnival' and includes the malicious URL. This indicates a social engineering lure designed to drive traffic to malicious infrastructure. The ML classifier strongly flagged this PDF as malicious.

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=free+powerpoint+template+slide+carnival
    • http://tubatekiv.dtraveladvisors.com/uploads/1/3/1/3/131379578/dofefuw.pdf
    • http://niwif.goshenyoutharts.com/uploads/1/3/2/7/132740961/kupejulexogi.pdf
    • http://mupel.mariepoza.com/uploads/1/3/0/8/130874493/688d83b9.pdf
    • http://files.jazzbeyondborders.com/uploads/1/3/1/4/131406861/ef2834.pdf
    • http://files.breastfeedinghousecalls.com/uploads/1/3/2/8/132815008/bilini-kejazekoruj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/87160579615.pdf
    • https://cdn.shopify.com/s/files/1/0435/8098/1403/files/edward_jenner_biography.pdf
    • https://cdn.shopify.com/s/files/1/0431/7275/7668/files/lidawiravakabor.pdf
    • https://cdn.shopify.com/s/files/1/0434/5449/6935/files/jazukalolilelavabu.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4679/files/characteristics_of_computer_generations.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2104/files/35480656281.pdf
    • https://cdn.shopify.com/s/files/1/0432/8708/5220/files/sunglasses_text_emoji.pdf
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/xetikusaximugojez.pdf
    • https://cdn.shopify.com/s/files/1/0428/8839/6959/files/timozezole.pdf
    • https://cdn.shopify.com/s/files/1/0430/8523/4338/files/21725644842.pdf
    • https://cdn.shopify.com/s/files/1/0430/9195/1769/files/lekibolijuribikabuwubokaw.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_off00006092.bin
2dbdaeb1b1f17ba8359cdb0ff34243e003060431c3801c081dd40eb740eb6b0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6092 5116 bytes
font_01_sfnt_off000071ea.bin
6f2cc59489f816974196df266abc0e62f48bf1fe557426393c54b925d912182d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EA 9652 bytes
font_02_sfnt_off000092fe.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92FE 4324 bytes

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