Malicious PDF — malware analysis report

Static analysis result for SHA-256 3084c205bc1515bd…

MALICIOUS

PDF

41.7 KB Created: 2020-08-11 12:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4f6cc2607edef6f8de285ef1a3a56202 SHA-1: 5d4fc8ed391e30bebb8b6958a8c744c578ef5b27 SHA-256: 3084c205bc1515bd35ad9df8333f24b919f1b7b9bf19479954950dfbf9fa4eb3
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=articles+explanation+and+exercises+pdf, which is likely used to direct users to a phishing or malware-hosting site. The document body itself is heavily obfuscated, but the presence of the malicious redirector and numerous other links suggests a link-farming or redirection attack.

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=articles+explanation+and+exercises+pdf
    • http://files.4sapservices.com/uploads/1/3/2/6/132681560/229853.pdf
    • http://files.ciescreations.org/uploads/1/3/1/3/131378950/webaxobuw.pdf
    • http://kopav.vector-business.com/uploads/1/3/0/7/130776885/af076.pdf
    • http://zewulelad.spiritualistsocietyofbarriessb.com/uploads/1/3/1/0/131070420/nigemifobu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/gipanafojawo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/73073162089.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/loi_binomiale_ngative.pdf
    • https://cdn.shopify.com/s/files/1/0432/2515/3698/files/bounce_off_game_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/nemezixu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/98170676530.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/free_download_to_excel_converter.pdf
    • https://cdn.shopify.com/s/files/1/0434/7808/9878/files/insuficiencia_cardiaca_aguda_y_cronica.pdf
    • https://cdn.shopify.com/s/files/1/0436/2679/1072/files/opel_astra_1998_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67295211500.pdf
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/energia_biomassa_como_funciona.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/89878522.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/23377835038.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_off0000644c.bin
2967ed981c6e29644e87bcc5cd5e770647cd38d18a7d182df78edb070cf2f1b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x644C 5204 bytes
font_01_sfnt_off0000760f.bin
793d2b0c0d5f00e4c1087c8bedcefa329e1a52af5295cfa8758ae25632167e82
pdf-font-stream PDF embedded font (sfnt) at offset 0x760F 10420 bytes