Malicious PDF — malware analysis report

Static analysis result for SHA-256 240b5597df6fe685…

MALICIOUS

PDF

42.5 KB Created: 2020-08-12 04:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82b39ce6abc0df466e6ebab27384e5b3 SHA-1: cc5542a5514177f08140abeb945696d79c58c387 SHA-256: 240b5597df6fe68578e6680a6bef827950a47642ed6c3142dd3438e698a3a134
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.ru/pify?keyword=tipos+de+conductores+y+aislantes+electricos+pdf`. Another critical heuristic identifies this as a PDF link farm, with 15 external links. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. No scripts were extracted from this sample.

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=tipos+de+conductores+y+aislantes+electricos+pdf
    • http://files.emilywood.info/uploads/1/3/0/9/130969489/wofuxe.pdf
    • http://files.guliagurevich.com/uploads/1/3/1/4/131410158/3084988.pdf
    • http://files.tren.net/uploads/1/3/0/7/130739856/f3ea78614de80.pdf
    • http://gulirew.essentialhealthsantacruz.com/uploads/1/3/0/7/130776167/vukareguvojak-fawabaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bofudajix.pdf
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/bafemabinem.pdf
    • https://cdn.shopify.com/s/files/1/0437/6225/3978/files/vutale.pdf
    • https://cdn.shopify.com/s/files/1/0430/7478/1338/files/microbiologia_veterinria_essencial.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/bomepofake.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/50306279194.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/jibuvawelixoruvibavenet.pdf
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/36216486519.pdf
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/wujona.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kubogofire.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1879/files/xisupavi.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_off000066ca.bin
28732a3dd62467c3ce9092479677c544f352335c214de6f8d1f38a89a9cc434d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CA 5200 bytes
font_01_sfnt_off00007886.bin
d7e1194ade20ddac0660d6ff7dddf18c1289cf5c2bf525c3f68bb340a41d6e31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7886 10784 bytes

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