Malicious PDF — malware analysis report

Static analysis result for SHA-256 58367dbbd8417f8c…

MALICIOUS

PDF

115.0 KB Created: 2020-08-20 08:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0058f3cd8e854c0e55ad75ac9d51803 SHA-1: d131d41f4ae7d367494dfa29c4b604bda4da46ce SHA-256: 58367dbbd8417f8cde0d2b9ae5986ac9ff0fdbc0ec16e02a88d3d9b0ee8d7648
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a critical redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains text referencing 'Cisco ws- c3850- 12s- s datasheet', suggesting a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict. The primary attack vector appears to be tricking the user into clicking the malicious link, which leads to a redirector likely serving further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=cisco+ws-+c3850-+12s-+s+datasheet
    • http://files.uwchipsi.com/uploads/1/3/1/3/131380031/21406df865ed.pdf
    • http://files.wildlittlemonkeys.com/uploads/1/3/1/6/131607131/ketomiwa-zabudap-jelujobi.pdf
    • http://files.codeelectricmqt.com/uploads/1/3/1/0/131069812/7459308.pdf
    • http://files.addaflooringandcabinets.com/uploads/1/3/0/7/130739366/9400469.pdf
    • http://files.edmotivate.com/uploads/1/3/2/6/132681296/xuvageju.pdf
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/dezoduxas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9862/0569/files/55554796360.pdf
    • https://cdn.shopify.com/s/files/1/0438/5875/5749/files/17019723055.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/79617011163.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/91960476686.pdf
    • https://cdn.shopify.com/s/files/1/0431/6561/4234/files/donobotu.pdf
    • https://cdn.shopify.com/s/files/1/0452/0479/9639/files/lewafokuburapakipu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2894/files/53061927447.pdf
    • https://cdn.shopify.com/s/files/1/0448/0273/6279/files/sql_database_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0429/2981/5705/files/81406697085.pdf
    • https://cdn.shopify.com/s/files/1/0437/1457/6537/files/lvmh_annual_report_2011.pdf
    • https://cdn.shopify.com/s/files/1/0432/0867/1394/files/vikemirojuzef.pdf
    • https://cdn.shopify.com/s/files/1/0437/8882/8829/files/color_by_addition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5539/0630/files/86725219962.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/davejolagudup.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_off00015eec.bin
f85915463ac114d410efa24aa6f48338326f53477bdcf8ab4090787a5d9eb90e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15EEC 5736 bytes
font_01_sfnt_off00017285.bin
7673ce376f2359b63eb9152766d7499793b00b214c7b6dc12f94d4477cb04101		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17285 17232 bytes
font_02_sfnt_off0001a814.bin
c13c73061a36bbab7dba68a0c7ccd42b426c19528502901f18dedde9d6c7394e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A814 16268 bytes

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