Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5c189421165b73…

MALICIOUS

PDF

42.4 KB Created: 2020-08-24 07:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6b3f9cbf3492684a1a34506715d6652 SHA-1: 76807619b7d8016dea92e123a1a658905d5092a1 SHA-256: 2f5c189421165b73781dcadf89ad42c87b0da83607b1d3445c27d1008ba6f0d6
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=griffon+gw2+guide, which likely serves as a gateway to a malicious payload. The document body is heavily obfuscated, but the presence of multiple links, including one to a potentially malicious redirector and a large number of SEO-linked PDFs, suggests a phishing or redirection attack. No scripts were extracted from this sample.

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=griffon+gw2+guide
    • http://files.mammasitta.net/uploads/1/3/0/7/130776602/69f4f50acee14.pdf
    • https://cdn.shopify.com/s/files/1/0440/7495/9000/files/67510763456.pdf
    • https://cdn.shopify.com/s/files/1/0448/9166/8647/files/appsc_group_2_syllabus_2019.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/65488760102.pdf
    • https://cdn.shopify.com/s/files/1/0431/3730/2690/files/28900667220.pdf
    • https://cdn.shopify.com/s/files/1/0428/3501/7884/files/baahubali_2_video_songs_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0427/3229/0215/files/130927906.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/jedajadumowatiwijamoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/fikexoreziwaseviv.pdf
    • https://cdn.shopify.com/s/files/1/0435/6443/3569/files/wawuzorewisonititowedu.pdf
    • https://cdn.shopify.com/s/files/1/0462/9358/1985/files/tracing_shapes_worksheet_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/wogadanezadopipedu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/ceramidas_iii.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_off0000691a.bin
12205e18fe9eadca76a9efdcbd6a913dbe2e8051be121d7348ac7341be527e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691A 4912 bytes
font_01_sfnt_off000079f9.bin
547679b2b534ff9dddee24e3392c05a5ebec764cd03345802935c555c2a78b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F9 10268 bytes

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