Malicious PDF — malware analysis report

Static analysis result for SHA-256 505db3d0ca3e26d5…

MALICIOUS

PDF

37.8 KB Created: 2020-08-12 02:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 449336f8d80e68dcf176e89bdb7d4a0c SHA-1: 0076921c52ceaf69be3e6ad865d47f5bf44db783 SHA-256: 505db3d0ca3e26d5d20a2736862e73c49afa34bb23a27db0a00baf97010c613b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'https://ttraff.ru/pify?keyword=blank+bingo+cards+printable+pdf'. Another critical heuristic indicates a PDF link farm, suggesting the document is designed to drive traffic to external sites. The document body, though partially corrupted, contains text related to 'blank bingo cards printable pdf' and the authoring application 'wkhtmltopdf', reinforcing the lure of a seemingly innocuous document. 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=blank+bingo+cards+printable+pdf
    • http://files.jpballard.com/uploads/1/3/1/4/131407080/mezowibewidizeximu.pdf
    • http://files.lakewoodmanor.ca/uploads/1/3/1/4/131453733/20f7ab747738497.pdf
    • http://pepom.singletree-emporium.com/uploads/1/3/0/7/130739561/932bf319.pdf
    • http://files.markmunzertcowboypoet.com/uploads/1/3/1/0/131069879/6837495.pdf
    • http://tofapa.newmantoronto.com/uploads/1/3/1/3/131383258/e870d43c36870.pdf
    • https://cdn.shopify.com/s/files/1/0431/4241/4493/files/99554167327.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/genetic_variation_in_drug_transporters.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4993/files/la_celestina_tragicomedia_de_calisto_y_melibea.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/tirajixuvozelokuvon.pdf
    • https://cdn.shopify.com/s/files/1/0434/1740/3559/files/11954578160.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/2221717303.pdf
    • https://cdn.shopify.com/s/files/1/0428/3649/2444/files/40442814506.pdf
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/55878531079.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2685/files/65006462961.pdf
    • https://cdn.shopify.com/s/files/1/0440/4068/3685/files/nys_power_of_attorney_form_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/9199/2484/files/68967403747.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_off00005545.bin
8eb2d4e41c496ed7f24d330f524204d67405661b6cb9c6d9f3f1c515a943fe8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5545 5576 bytes
font_01_sfnt_off0000684a.bin
f6fcb35c2b73bd993e2b7994c0086097268129bd72585f1e83471478a003b6c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x684A 9912 bytes