Malicious PDF — malware analysis report

Static analysis result for SHA-256 b78b1b9fdefe213e…

MALICIOUS

PDF

42.8 KB Created: 2020-08-18 21:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffae2b25edf47367e6e0a554675c272f SHA-1: f3520ffaa8f6b16d3703568f9a6ea9a6c8b4455c SHA-256: b78b1b9fdefe213e55a4506ff3de2151d76c8475ca712ae2cb22fa0ad1d50302
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with heuristics indicating a link farm and a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=android+calibre+content+server', which is likely used to obscure the final destination or to track user clicks. The large number of links hosted on cdn.shopify.com suggests an attempt to leverage legitimate infrastructure for malicious purposes.

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=android+calibre+content+server
    • http://files.supermariosurfski.com/uploads/1/3/0/8/130814254/bd16b7376975e0.pdf
    • http://files.tarafinnigan.com/uploads/1/3/2/6/132682655/sidozo.pdf
    • http://files.accessconsciousness7day.com/uploads/1/3/1/3/131398428/siwuzudanevavo.pdf
    • http://files.morethansoulfood.net/uploads/1/3/2/3/132302973/timuf.pdf
    • http://vaguxu.metropolitanchristianbibleinstitute.com/uploads/1/3/1/3/131380600/9097545.pdf
    • https://cdn.shopify.com/s/files/1/0432/1283/2932/files/29495834938.pdf
    • https://cdn.shopify.com/s/files/1/0437/8705/9362/files/najusagevugikexugefe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7714/8571/files/ccna_security_book_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/9690/7684/files/boat_browser_pro_8._7._4_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/vusiganawive.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/dism._exe_online_cleanup-_image_startcomponentcleanup.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2208/files/6654994888.pdf
    • https://cdn.shopify.com/s/files/1/0431/4536/3616/files/holy_bible_new_king_james_version_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/kekizib.pdf
    • https://cdn.shopify.com/s/files/1/0429/6107/6387/files/kerala_university_bsc_physics_syllabus_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7312/files/pepipi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/sojedefajojipoba.pdf
    • https://cdn.shopify.com/s/files/1/0433/0261/7252/files/fundamentals_of_astrodynamics_solutions_manual.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_off00006975.bin
f9476a7f75edf7d8fad1dc182d96679265bc170759f4c13b8d2eab65922957bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6975 5124 bytes
font_01_sfnt_off00007ae8.bin
71200d9277b7e4bdd53d5a8a98e5c556059bb55980ed5d981913b9b69488ff8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE8 10128 bytes