Malicious PDF — malware analysis report

Static analysis result for SHA-256 c66dc020d0c32397…

MALICIOUS

PDF

67.2 KB Created: 2020-07-23 07:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86c074a762f7879740a8d3f39ca7d699 SHA-1: 6e2a8fdf6979f583d2a62aff251c9467c3f4cef1 SHA-256: c66dc020d0c32397b653230a791f3b171d8ea29dc04ae8b12966471f830c3387
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources hosted on platforms like Shopify and WordPress, suggesting a link farm or SEO manipulation tactic. One of the primary links, 'https://ttraff.cc/pify?keyword=porque+las+bacterias+son+resistentes+a+los+antibioticos+pdf', is identified as a malicious redirector, indicating the document's intent is to lead users to harmful content. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

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.cc/pify?keyword=porque+las+bacterias+son+resistentes+a+los+antibioticos+pdf
    • http://files.brockskennel.com/uploads/1/3/2/6/132681210/vobope-nuvekulex-zezawojogatuvug-posej.pdf
    • http://files.cintiadana.com/uploads/1/3/1/6/131636697/gireruwegut-gulof-jigepiv.pdf
    • http://files.malvern-electrics.co.uk/uploads/1/3/2/6/132682039/9574694.pdf
    • http://files.thenoblestoneonline.com/uploads/1/3/1/3/131397927/mazuzogik.pdf
    • https://cdn.shopify.com/s/files/1/0435/3789/1480/files/46921663437.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46946939033.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/88944604968.pdf
    • https://xuzubika.files.wordpress.com/2020/06/34628537887.pdf
    • https://xujisitugure.files.wordpress.com/2020/06/fupejilebelotazegewetaper.pdf
    • https://naxopovo.files.wordpress.com/2020/06/74171760139.pdf
    • https://lopalulejit.files.wordpress.com/2020/07/lanuvudiweduzikitutitem.pdf
    • https://dupowoso.files.wordpress.com/2020/07/93526517074.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/xizekedoro.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3505/files/81080541460.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/48201035985.pdf
    • https://cdn.shopify.com/s/files/1/0434/3981/6861/files/67191336901.pdf
    • https://cdn.shopify.com/s/files/1/0430/3798/2869/files/94618146349.pdf
    • https://cdn.shopify.com/s/files/1/0433/0084/7781/files/5114520854.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8894/files/fubafozezedofiparipubixe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3702/2615/files/zanivujojegi.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_off0000becd.bin
fa893e4ac946ee0f86041fddd4d881f27df4b1e2b0d562428e631090411b2d5e
pdf-font-stream PDF embedded font (sfnt) at offset 0xBECD 5296 bytes
font_01_sfnt_off0000d0d4.bin
912ef35e2423a038c00d538804beed01c637ef88b7e9f597569647c770aab22c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D4 14524 bytes