Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdcb4e2356e12f4a…

MALICIOUS

PDF

48.9 KB Created: 2020-07-09 09:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f9c2193a87130dc79e2142cd7ad18c1f SHA-1: 4ef053a1b58db4a0b0bf4b4fbaeccb3adda798d6 SHA-256: bdcb4e2356e12f4a70272d7275d7fc58c96e286857c0f75a0eea2f0c96f22834
152 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the link 'https://ttraff.cc/wb?keyword=ford%20fusion%202012%20sel%20manual' leads to known malicious infrastructure. Additionally, the 'PDF_SEO_LINK_FARM' heuristic suggests a large number of external PDF links were generated, likely to manipulate search engine results and distribute malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wb?keyword=ford%20fusion%202012%20sel%20manual
    • http://files.theriversedgeranch.org/uploads/1/3/1/8/131871762/0f162.pdf
    • http://files.bellafurworks.com/uploads/1/3/1/8/131856381/duguvat.pdf
    • http://files.sycamorebandandorchestra.com/uploads/1/3/1/0/131070289/d11c8936.pdf
    • http://files.romainewashington.com/uploads/1/3/1/8/131857193/ropodefi.pdf
    • http://files.marketmovesmatt.com/uploads/1/3/0/8/130874629/nuvigure-bufagejiv.pdf
    • http://files.nationalrpoclinic.com/uploads/1/3/0/9/130969046/1863214.pdf
    • http://files.focusedlearningsolutions.com/uploads/1/3/1/6/131636990/49d8e9.pdf
    • http://files.southernmiddlemusic.com/uploads/1/3/0/7/130775902/83ad83119e.pdf
    • https://sexedituf.files.wordpress.com/2020/06/81366116856.pdf
    • https://natebiwogu.files.wordpress.com/2020/06/nirabamisoligoparivom.pdf
    • https://vamukivi.files.wordpress.com/2020/07/71967169425.pdf
    • https://kapavefewo.files.wordpress.com/2020/06/gufutetime.pdf
    • https://negowonot.files.wordpress.com/2020/07/60170312004.pdf
    • https://kemubebi.files.wordpress.com/2020/07/45984351443.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37357510366.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gejazopemovaro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/97253363073.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/69440205977.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007187.bin
d1dbcfa0102b05fa6a089a3dd64e28f0f2aedbce687af76b1360fbef96556068		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7187 5136 bytes
font_01_sfnt_off000082dd.bin
15d7ff6bdd8797cff3274d9100fbbdb4c101b8203f3060dc7eb526857a28ffa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DD 17504 bytes

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