Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4072b0953cdef2…

MALICIOUS

PDF

54.9 KB Created: 2020-08-09 01:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c60861e2f317d5831776773d7f3c6348 SHA-1: 3dc55fb2a2b377471b442863a4712472445addb4 SHA-256: df4072b0953cdef2df9844a1e22b6ddcfb441bb4903871ef69ed10ea8be4decc
128 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to external PDF files hosted on various domains, suggesting a link farm for SEO manipulation or to obscure malicious redirects. One critical heuristic identified a link to a known malicious redirector, 'ttraff.ru', which is used to lure users with a search query for educational material. The presence of a 'download button' heuristic further supports the lure-based attack pattern. No scripts were extracted, but the PDF structure and embedded links are sufficient to infer a malicious redirection attempt.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=9th+class+english+textbook+pdf+ssc
    • http://wodovaf.michaeljameslynch.com/uploads/1/3/1/3/131383791/3675404.pdf
    • http://files.mountainvalleygscamp.com/uploads/1/3/1/0/131070867/zekigew-buwedi-futode.pdf
    • http://files.christypaw.com/uploads/1/3/0/8/130814788/6881534.pdf
    • http://foduv.actdebatingunion.com/uploads/1/3/0/7/130739625/vinokedabifu.pdf
    • http://ginor.ksmithla.com/uploads/1/3/0/9/130969723/kekopozilapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/bukedako.pdf
    • https://cdn.shopify.com/s/files/1/0438/6376/9243/files/salaliwisiluwonavexi.pdf
    • https://cdn.shopify.com/s/files/1/0436/2538/2051/files/greg_howlett_amazing_grace.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19194700937.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/chevy_malibu_repair_manual_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/6057/5912/files/labevixivobupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/64524814152.pdf
    • https://cdn.shopify.com/s/files/1/0429/5881/5398/files/o_reilly_head_first_python.pdf
    • https://cdn.shopify.com/s/files/1/0427/8370/3206/files/xifetilaxowenebivilunavus.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/fumutajadofokekonir.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/exercices_accord_participe_pass_avec_avoir.pdf
    • https://cdn.shopify.com/s/files/1/0437/2345/6661/files/98960209001.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007bca.bin
c60c486bceeb04a5e0e6a106866a0ffd2b96797141b2dfda151893ae69c5f7fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BCA 5656 bytes
font_01_sfnt_off00008f0a.bin
f744d6fba26f820e4a443fc45911177c264a6ea2c72ea480764417b6e462b341		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0A 5600 bytes
font_02_sfnt_off0000a118.bin
2c4019da17bd4aae9d11adf677de6c51fe1d999a300d5ee588a763ed0da52769		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA118 13668 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.