Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d610a7160cba772…

MALICIOUS

PDF

47.5 KB Created: 2020-08-09 02:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf1e3d6ed4cd65173f6daace5f2bb14c SHA-1: 74b5f2caa383add1da7a32694d50a26d90b8e3fb SHA-256: 4d610a7160cba772afded3d20b353f8e802e9003c7ee845bd8df3d88dfa343d5
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=goblin+stay+with+me+guitar+tab+pdf'. This URL is embedded within the document body, suggesting a social engineering lure disguised as a guitar tab. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy, likely to obscure the malicious redirector and improve SEO. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=goblin+stay+with+me+guitar+tab+pdf
    • http://files.eidolonmedia.com/uploads/1/3/1/4/131438274/muwutagig-pibode-buduvimisigis-nupebora.pdf
    • http://files.linderdwyertherapy.com/uploads/1/3/2/3/132303123/sitetizasolagat-tirujifoni-pukowi-fodisepudutud.pdf
    • http://files.bigshotpressurewashing.com/uploads/1/3/1/3/131398117/wigaz_gijoxa_mogurudawet_lusexibibibesu.pdf
    • http://files.rachaeltilly.com/uploads/1/3/0/7/130739140/noxizunubigebolop.pdf
    • https://cdn.shopify.com/s/files/1/0431/5109/8007/files/pexosefitawejeroxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2956/0486/files/mederi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3554/files/513641241.pdf
    • https://cdn.shopify.com/s/files/1/0433/6372/9557/files/vugamojupexinigawagev.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/bihar_stet_question_paper.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/maruzuvigewebejukotu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/isaac_asimov_ignorance.pdf
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/wutaziwupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rerotapok.pdf
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/rixexaxotezixabapikarek.pdf
    • https://cdn.shopify.com/s/files/1/0433/6248/4392/files/38441500180.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/bopinosukipopibijobowotib.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_off00006cbd.bin
9b41bda972fe80f7c53e90b88946a70817d422105d249cfe7751c8a4d035ec91
pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBD 5820 bytes
font_01_sfnt_off0000807b.bin
1f8ac9b54f1d9bc3f6621de5e9f90a394d8169d9c2d09d1216b6a7c6a82bf309
pdf-font-stream PDF embedded font (sfnt) at offset 0x807B 15344 bytes