Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c1bb7fabbcda1a1…

MALICIOUS

PDF

37.6 KB Created: 2020-09-16 18:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 016ce7bc06e8e0fc119dd2d55bafb922 SHA-1: 9b91cc1026313dd7d9e3c6473e187e58ec77aca1 SHA-256: 2c1bb7fabbcda1a197b4e5f2141ad2933784fa0841fa6ba3a5ae862792f04520
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector URL (https://ttraff.ru/wix?keyword=ghetto+stories+full+movie+download). This indicates a link farm or phishing attempt designed to lure users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=ghetto+stories+full+movie+download
    • https://b41bfcf1-8027-4d84-ad4e-2f5dc02d82de.filesusr.com/ugd/1cc777_831caed3276e4602a189194f7f081184.pdf?index=true
    • https://5d564158-9874-4f66-8dd5-bb909ce7a13d.filesusr.com/ugd/77941b_e5d8c5253f6740608ef2521eece26be3.pdf?index=true
    • https://7088578b-5afa-4b01-8a54-a600cf35e695.filesusr.com/ugd/9d869b_733e277af2d44b94ba6207594cc6c362.pdf?index=true
    • https://0b70fcaa-9827-4285-95aa-36b2e0e5b424.filesusr.com/ugd/bcd086_1adc0c97985e4da39633f98c55bf6afc.pdf?index=true
    • https://66ee1da2-3b32-4724-8f95-87e6733ed276.filesusr.com/ugd/314c35_46e54028f40d44539eceee2dccd512f3.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0432/0218/3325/files/baka_to_test_to_shoukanjuu_light_novel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/vowoveful.pdf
    • https://cdn.shopify.com/s/files/1/0434/2025/4375/files/analysis_and_design_of_cable_stayed_bridge.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3529/files/sushant_khatri_dance_plus_2_performance.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3434/files/rizedut.pdf
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/musamobemalif.pdf
    • https://cdn.shopify.com/s/files/1/0433/9479/3635/files/sejul.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/vasavofukepagitulo.pdf
    • https://cdn.shopify.com/s/files/1/0435/8848/5288/files/arris_tm822g_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7485/5846/files/lunepolen.pdf
    • https://cdn.shopify.com/s/files/1/0439/4831/0683/files/they_call_me_cuban_pete.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_off0000533b.bin
a8b8aa884f01a0c81420e39cf8b4394e59aecbf8e17d0a22718f40f46dde239a
pdf-font-stream PDF embedded font (sfnt) at offset 0x533B 5332 bytes
font_01_sfnt_off00006545.bin
0c439665070eea6489f317b3075ff5b8b01ef6b1bcbcdad098b8333fbd12de4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6545 10588 bytes