Malicious PDF — malware analysis report

Static analysis result for SHA-256 559bdb8c82e9a10d…

MALICIOUS

PDF

45.4 KB Created: 2020-08-21 12:27:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c3dd63f44baec900619ad1079eba211c SHA-1: baed6524221d86b922feba6c52bb1e2ed6ac059d SHA-256: 559bdb8c82e9a10da624c1c57b91ed7ef3b76e08a146e7d398d098110179d7d8
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Endnote x6 product key free' and a URL pointing to a redirector. This suggests a social engineering lure to trick users into downloading potentially malicious content. The primary malicious IOC is the redirector URL.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=endnote+x6+product+key+free
    • http://files.mskeleta.com/uploads/1/3/1/8/131857758/2617484.pdf
    • http://files.mmamta.org/uploads/1/3/2/6/132681783/goxoduwir.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7957/files/mapa_de_angola.pdf
    • https://cdn.shopify.com/s/files/1/0428/8210/5511/files/zapir.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/76060699541.pdf
    • https://cdn.shopify.com/s/files/1/0436/1761/6034/files/pewdiepie_minecraft_seed.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/26502873957.pdf
    • https://cdn.shopify.com/s/files/1/0429/6327/1833/files/birkenhead_sixth_form_college_term_dates.pdf
    • https://cdn.shopify.com/s/files/1/0432/2741/4696/files/belapepeviwalobifa.pdf
    • https://cdn.shopify.com/s/files/1/0431/3199/4280/files/xivufofu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/2196930123.pdf
    • https://cdn.shopify.com/s/files/1/0434/2530/0629/files/simple_past_mixed_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/1979/5623/files/isotropic_minerals.pdf
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/bapazepojufober.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_off00006ff6.bin
3fe6df654f7e52417e4d17aa0e49130735e116857584c720c6f3628f5c62ede9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF6 5072 bytes
font_01_sfnt_off0000815d.bin
2f40672cae3669352d5c03adf66cd1ed093e4d23ce89defc240afa2667c1dbc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x815D 13088 bytes

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