Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb465278a795826…

MALICIOUS

PDF

54.2 KB Created: 2020-08-12 10:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 987ab26122c6d3e97ab4dc0105e4173f SHA-1: af4d691bd1f676422c30fac9f8f8da54ac1c6f42 SHA-256: bfb465278a795826e7c598b0f1fbc573312f053d14284d038c647237603c03e1
150 Risk Score

Malware Insights

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

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or malware distribution attempt. The document body, though partially corrupted, contains the text 'Manual de tornillos y tuercas pdf' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of numerous external PDF links, many hosted on Shopify, further supports the link farm heuristic. No scripts were extracted from this sample.

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.ru/pify?keyword=manual+de+tornillos+y+tuercas+pdf
    • http://files.teamupessentrics.com/uploads/1/3/1/8/131872015/4068343.pdf
    • http://lufopevug.goldfishprints.net/uploads/1/3/1/4/131408849/goxuvunerul-gaxasu-vaxozejisimal-boregur.pdf
    • http://files.dsdpdconference.com/uploads/1/3/1/4/131437669/1465908.pdf
    • http://files.bargersbargains.com/uploads/1/3/1/3/131384636/wafuxapaguwa.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8383/files/pdf_editor_ubuntu_14._04.pdf
    • https://cdn.shopify.com/s/files/1/0430/7081/6407/files/majorufudupozipewuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/67910668432.pdf
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/7977559380.pdf
    • https://cdn.shopify.com/s/files/1/0434/4401/1168/files/84285311605.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/rijovugekugavuwubix.pdf
    • https://cdn.shopify.com/s/files/1/0430/7058/7029/files/18540459700.pdf
    • https://cdn.shopify.com/s/files/1/0436/5480/7717/files/lowes_defiance_ohio.pdf
    • https://cdn.shopify.com/s/files/1/0437/3712/0933/files/furezifovuxefad.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/fotoxubagoxu.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_off00009080.bin
b91d4a535c4ed43236fb925729d5938cf040f3ce9a052aa32fff25e0ba4bc094		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9080 5256 bytes
font_01_sfnt_off0000a27c.bin
0459f97474e61a747785cbca61f93414cb35e5895778c1954d8ad015f4430aaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA27C 12424 bytes

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