Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16b11d30b4da2e4…

MALICIOUS

PDF

47.8 KB Created: 2020-08-17 15:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a49d72f8b5f277dd42e9edfec162053f SHA-1: 667ce6b38266d6f3801542bf39b299ece3e6daa4 SHA-256: f16b11d30b4da2e4d30b2b55a9931f2df38f3c623a63493a87791f559006a219
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=connected2me+hack+apk', suggesting a lure for a 'connected2me hack apk'. The presence of a visual download button heuristic further supports the lure-based attack pattern. No scripts were extracted from this sample.

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=connected2me+hack+apk
    • http://files.cottonwoodfarmok.com/uploads/1/3/0/7/130738836/7114513.pdf
    • http://files.gatewayhoundclub.com/uploads/1/3/0/7/130739852/40605.pdf
    • http://files.leicesterallscars.org/uploads/1/3/0/7/130739366/13639bb928883.pdf
    • http://tezamefi.cities360.nl/uploads/1/3/1/6/131607321/8a07794d8.pdf
    • http://bifij.healinghandofgrief.com/uploads/1/3/1/4/131437919/7224034.pdf
    • https://cdn.shopify.com/s/files/1/0429/3161/7945/files/8750811499.pdf
    • https://cdn.shopify.com/s/files/1/0438/7412/3944/files/practical_reliability_engineering_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/7663/2220/files/amides_and_amines.pdf
    • https://cdn.shopify.com/s/files/1/0431/3009/3728/files/public_finance_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/0261/0335/files/sedeviwadameb.pdf
    • https://cdn.shopify.com/s/files/1/0431/4831/2740/files/numeros_en_ingles_pronunciacion_y_escritura.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/10721253721.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/wordscapes_level_118_arch_6_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/dogowewagixulilibopoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/kegipawalodexosizixo.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_off0000796e.bin
d2d2d54f8ab82e42c91aa6d33e642fd5620fa543051569223ec162605eb47f51
pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 5108 bytes
font_01_sfnt_off00008aa3.bin
d1a96def8d0fd4b43b06c79fac539c2585bd266b89487ed2fd0d5d78bb7f75e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA3 12380 bytes