Malicious PDF — malware analysis report

Static analysis result for SHA-256 49998dba5ed3a2e0…

MALICIOUS

PDF

65.7 KB Created: 2020-08-22 20:01:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aeba181cf594a56d1cc5fc7f678f802 SHA-1: d1a4e9dd79634d3e138c8c18afa0d916fe0ab9a7 SHA-256: 49998dba5ed3a2e0edcd6507f0ab42e45885711ff16947aee2b3a4bdd34c81fe
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a video game guide. The PDF also contains a large number of external links, many of which point to Shopify domains, suggesting a link farm for SEO manipulation. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=akiba%2527+s+trip+undead+undressed+ending+guide
    • http://files.i4ingenuity.co.uk/uploads/1/3/1/1/131164531/a117ab0a5ae.pdf
    • http://vesez.galaxyexplorationsholdings.com/uploads/1/3/1/4/131406286/8856324.pdf
    • http://files.grignonmansion.org/uploads/1/3/0/7/130775859/4108081.pdf
    • http://sugajix.innyoutybrollie.com/uploads/1/3/1/3/131380845/df37d7f606d95c.pdf
    • https://cdn.shopify.com/s/files/1/0438/8945/9368/files/92093339097.pdf
    • https://cdn.shopify.com/s/files/1/0431/5345/7320/files/cambridge_english_advanced_3_student_s_book_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/46231232548.pdf
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/biriduk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/bihar_si_previous_year_question_paper_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/9938/2170/files/91050034233.pdf
    • https://cdn.shopify.com/s/files/1/0439/2170/3067/files/85295969362.pdf
    • https://cdn.shopify.com/s/files/1/0431/9608/8481/files/ashokan_farewell_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0428/4809/2323/files/transformation_of_sentences_affirmative_to_negative_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0435/5165/4047/files/bloqueo_av_de_alto_grado.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007eb0.bin
37f61c3df9fc3080c92245c081ee21ce4d0d27f401d3520003a793d621f90fe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB0 16720 bytes
font_01_sfnt_off0000b4a1.bin
9fc4c64fe46444537f98c20c625c7365e74a7062364904cbe98034ed68210f0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4A1 5092 bytes
font_02_sfnt_off0000c5f2.bin
107a0c01566ef25a9156d9b26a66a1f4d5df05b07bb0b5f2dd579edd56ac28b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F2 10324 bytes
font_03_sfnt_off0000e949.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE949 4324 bytes

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