Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6c6ab16d890583b…

MALICIOUS

PDF

59.9 KB Created: 2020-08-21 03:06:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d7e5ebae0a38a9b55d1da641f07cab8 SHA-1: e5ae5f1cf81af2248d66295168b8421e6206e5c6 SHA-256: c6c6ab16d890583b1b814921e5d4305bc25afffe883c36e8c59ed052848ebdc7
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector (ttraff.com). The document body, though heavily obfuscated, contains text related to 'cystic fibrosis treatment guidelines australia' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct execution behavior.

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=cystic+fibrosis+treatment+guidelines+australia
    • http://buzon.colinguthrieking.org/uploads/1/3/1/6/131637881/135865.pdf
    • http://files.daffodilacres.com/uploads/1/3/0/7/130775171/6878424.pdf
    • http://xovipob.uniquelyyourscandles.com/uploads/1/3/1/3/131381428/siwawurekaxiwene.pdf
    • http://jojane.vineleavespress.com/uploads/1/3/2/3/132303382/nofajaz-vuxagewotepamin-tomosok.pdf
    • http://files.stfrancesbasketball.com/uploads/1/3/0/7/130775102/3353682.pdf
    • https://cdn.shopify.com/s/files/1/0432/2807/0052/files/lebamuguzuw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6285/3794/files/jozijikoregukufoted.pdf
    • https://cdn.shopify.com/s/files/1/0433/8014/6339/files/53348694552.pdf
    • https://cdn.shopify.com/s/files/1/0431/6348/4315/files/vemunexusuwewaram.pdf
    • https://cdn.shopify.com/s/files/1/0431/0574/7108/files/fosew.pdf
    • https://cdn.shopify.com/s/files/1/0432/6889/8966/files/43953255520.pdf
    • https://cdn.shopify.com/s/files/1/0434/9588/2918/files/43374352881.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/fda_vaccine_adverse_event_reporting_system.pdf
    • https://cdn.shopify.com/s/files/1/0435/2281/8200/files/laweliruzadofopelilibagup.pdf
    • https://cdn.shopify.com/s/files/1/0447/8612/2901/files/estrus_synchronization_protocols_in_dairy_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/juzopuzenafososokazulu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7471/4790/files/happy_birthday_cake_photo_image.pdf
    • https://cdn.shopify.com/s/files/1/0429/5429/3402/files/64371901563.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/birurofefuwodapakuw.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_off00009c64.bin
1f6ca2d47c2233fcdccf664dd7af983195bf82acf2203c69724bfc0a6c8939ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C64 5488 bytes
font_01_sfnt_off0000aef2.bin
470d8828d8c6da4b967b92ff698c1846c880e3e78097742697ba87dee110b40a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEF2 11304 bytes
font_02_sfnt_off0000d3f0.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F0 4324 bytes

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