Malicious PDF — malware analysis report

Static analysis result for SHA-256 b50fe735f1c3f404…

MALICIOUS

PDF

57.8 KB Created: 2020-08-31 13:43:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 810c4b754a65a1480f5a775af9b1454f SHA-1: bcda58b6efe5a037e9a05ff0d1bfebebc5779f42 SHA-256: b50fe735f1c3f404d49973c6c5b2a67840e269eb4320230a73b793aeaca7cac1
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL and keywords suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify. The primary malicious URL is 'https://ttraff.com/pify?keyword=american+revolution+battle+chart+answers'. No scripts were extracted from this sample.

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/pify?keyword=american+revolution+battle+chart+answers
    • https://cdn.shopify.com/s/files/1/0431/4460/9943/files/velocidad_lectora_palabras_por_minut.pdf
    • https://cdn.shopify.com/s/files/1/0434/0668/8412/files/vsepr_theory_molecular_geometry_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0461/4186/6137/files/canon_5d_mark_ii_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/8348/0736/files/ashab_e_kahf_story_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1333/files/biostatistics_examples_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/fivuj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3982/4799/files/95649589621.pdf
    • https://static.usrfiles.com/ugd/36f25b_8657e8dba3ff4a6098d5db4d3ac413b4.pdf
    • https://static.usrfiles.com/ugd/73cb9e_7dfdb6077f084b7eb7d792bb56c69034.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8a3b5f26b1c43e3b0c78f03e4a0e224.pdf
    • https://cdn.shopify.com/s/files/1/0429/2198/4166/files/tutorial_de_autocad_civil_3d_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/bimimitem.pdf
    • https://cdn.shopify.com/s/files/1/0440/6912/6309/files/smart_irrigation_system_project.pdf
    • https://cdn.shopify.com/s/files/1/0437/9086/0449/files/controle_geographie_5eme_croissance_demographique.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/lajetexadifuzekumo.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_off0000a4ad.bin
be982199531085c35a7a52f8ec63580fe6394aa2c295184c40601da41e17d80c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4AD 5320 bytes
font_01_sfnt_off0000b6a7.bin
6ced642570e67c2cd0aea32914035e5a26965f5c9e136f89158bd2fc96f0e712		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB6A7 10304 bytes

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