Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d6f52ff451f9352…

MALICIOUS

PDF

50.1 KB Created: 2020-08-19 14:39:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38b3e5bca9ecdb511b51158076aa9f49 SHA-1: 8cfebc60116a8fa396b607a654f100e2085bee57 SHA-256: 3d6f52ff451f9352dcfc915fdbd83e4f5c6c22acf2c9ecc11e7474aa33e08d7b
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to Shopify domains but are likely part of a link farm. One critical heuristic firing indicates a direct link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to lure users into clicking malicious links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=disgaea+5+complete+guide+book
    • http://files.landisgreat.com/uploads/1/3/1/6/131606208/14ce8.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/gevefefemipitudizepabuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0209/files/gebulinemelebukixobireta.pdf
    • https://cdn.shopify.com/s/files/1/0435/4398/6330/files/343894683.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/astrology_for_dummies_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/4386/4224/files/66821545935.pdf
    • https://cdn.shopify.com/s/files/1/0434/3237/8517/files/66466644564.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9957/files/ham_radio_license_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/barcelona_metro_map.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/35118445627.pdf
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/69531249710.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_off0000790c.bin
08aa73e78d9cd96f88b0e355a074fa4370f5bcc6b17fffe7a9dbc9aeefccf752
pdf-font-stream PDF embedded font (sfnt) at offset 0x790C 5624 bytes
font_01_sfnt_off00008c14.bin
2d1c02d7faeb7dad5af5d103f135926a0d4fd4e69f3a7da8959d46cf8e88466d
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C14 3120 bytes
font_02_sfnt_off00009897.bin
d891d690bd7a92a51a56ad7a6392d914a9e8a219c89366805abfea24a1979b83
pdf-font-stream PDF embedded font (sfnt) at offset 0x9897 10124 bytes