Malicious PDF — malware analysis report

Static analysis result for SHA-256 8608f2901f1983e0…

MALICIOUS

PDF

39.7 KB Created: 2020-09-01 03:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf6f2f4e041fd5750a18a27193fd5c71 SHA-1: 1295c0514c0ddd253245b74c9ad24c148ccac19c SHA-256: 8608f2901f1983e0ef8fc58f5fa60d4b9921478c1b77a5a8b327f9e9528e3514
150 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, including one pointing to a known malicious redirector. The primary malicious URL identified is https://ttraff.com/wix?keyword=forest+dwelling+template. This suggests the document's purpose is to lure users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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.com/wix?keyword=forest+dwelling+template
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/94303320102.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/bpsc_ae_mains_syllabus_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7676/files/fejex.pdf
    • https://cdn.shopify.com/s/files/1/0438/4981/0070/files/45946900067.pdf
    • https://cdn.shopify.com/s/files/1/0431/0899/1140/files/36183945114.pdf
    • https://cdn.shopify.com/s/files/1/0435/0246/9285/files/72512865538.pdf
    • https://cdn.shopify.com/s/files/1/0440/5205/4181/files/vafisegeludotexisaporeb.pdf
    • https://cdn.shopify.com/s/files/1/0434/6645/7254/files/dolepogajexim.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/raxafaziwozomuxowukano.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2984/files/biten.pdf
    • https://cdn.shopify.com/s/files/1/0462/4272/6042/files/78097123978.pdf
    • https://static.usrfiles.com/ugd/1df9ea_1ade6ef7fee34e158abf40e9834832fc.pdf
    • https://static.usrfiles.com/ugd/ca32a8_b521398ed96e49daba06ab231707e07f.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_off00005f15.bin
55a82c9f298bdd505ca1853058939a689758795c5fd5adca79f673a2376325ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F15 5324 bytes
font_01_sfnt_off0000712c.bin
d81bdd554cf5a9e916c2e0c18e1a52f2a14e7e4c08914275802f210b71ce5395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712C 9860 bytes

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