Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b0abdf6bcc2a19d…

MALICIOUS

PDF

41.1 KB Created: 2020-08-10 17:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca2ed10ecae3ceb9639e71bf2f04637 SHA-1: 2a4ecd6099c9bb5ac1998b749087fa4646cd2efa SHA-256: 1b0abdf6bcc2a19dad4bbfc53c3e302d9dee132058ab9555dfe6f9e506159b2a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a redirector to known malicious infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a significant number of external PDF links, suggesting an attempt to manipulate search engine results or distribute content through a link farm. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a specific user-facing lure.

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=erm+enterprise+risk+management+pdf
    • http://vejis.wisdombodyandsoul.com/uploads/1/3/2/7/132712615/57e62d937b4.pdf
    • http://files.funkytownculture.com/uploads/1/3/2/6/132682802/jotexugowovi-pibukurinuviso-guxatewirisa-torapo.pdf
    • http://voviru.alliedcontractorsgroup.com/uploads/1/3/2/6/132681352/daremugafopafaj_rupogerab_kilalowe_kunitimipada.pdf
    • http://mivow.spanishkc.com/uploads/1/3/1/4/131453574/rupeduv_powigi.pdf
    • http://sinaro.kauaideeptissue.net/uploads/1/3/1/4/131406082/gulogokexi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4293/0842/files/61355632801.pdf
    • https://cdn.shopify.com/s/files/1/0431/5404/7137/files/analysis_services_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/fixakeretijo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6779/3817/files/how_to_compress_video.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/51472496299.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/rolujakogokemovososemudus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/30627016044.pdf
    • https://cdn.shopify.com/s/files/1/0434/8339/8310/files/wimonubowifevita.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/felamisakawubibaxejurelok.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/computer_networking_basics_book.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_off000060a3.bin
2b9b07022bdc65846742e2d5d43c574803386694016e9033c5d14bd865b9e441
pdf-font-stream PDF embedded font (sfnt) at offset 0x60A3 5348 bytes
font_01_sfnt_off000072b5.bin
a241c1ff28f62645dcc4db955669cca017902231d049831317cfd3b63f50d5b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x72B5 11288 bytes