Malicious PDF — malware analysis report

Static analysis result for SHA-256 45228b800fa38954…

MALICIOUS

PDF

43.4 KB Created: 2020-08-08 02:22:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57ca12fbdbdf5b8d2782e11609870639 SHA-1: d171406d6ffc8f240ff1320e1f56d62c7100a45f SHA-256: 45228b800fa3895445bd0e7adef781720ae4f31e794a8121ebac2d24010377de
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the embedded links, https://ttraff.ru/pify?keyword=cell+cycle+pdf+2020, is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. The presence of a link farm and a malicious redirector strongly indicates a phishing 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=cell+cycle+pdf+2020
    • http://files.yiboneh.com/uploads/1/3/1/4/131409009/vowuze_kowagimasok_tisopubimib.pdf
    • http://nitixogud.iamrockysworld.com/uploads/1/3/1/1/131164239/fododibonofu-somivatemuk-xozijubor.pdf
    • http://files.rmbscenic.com/uploads/1/3/1/4/131483685/misaw-xesaxinekuxa-nikonozelemip-mipakat.pdf
    • http://files.easychordz.com/uploads/1/3/1/1/131163897/9530669.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3434/files/lirefomidokuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/gotta_go_fast_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0439/0499/1400/files/rsiliation_de_bail_commercial.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/34471038456.pdf
    • https://cdn.shopify.com/s/files/1/0427/5788/2022/files/51843398896.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/robupidoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/gumaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/39720928980.pdf
    • https://cdn.shopify.com/s/files/1/0432/9593/2584/files/cambridge_checkpoint_science_workbook_9_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/22955986085.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/mercer_weighted_grade_calculator.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_off00006cec.bin
f8bb9cee292b6108d837131ddbb1f249431ca145f51fe3c9732300b183d1fa59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEC 4944 bytes
font_01_sfnt_off00007de8.bin
07f4ee3b069a56e8bb3da4b3558176f11a29aff07a6b1f1fce81035f4b4b0d23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE8 10260 bytes

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