Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c9886d94bae1863…

MALICIOUS

PDF

42.4 KB Created: 2020-08-22 09:01:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9da8cd98ae5455f2b19bad8418134ec5 SHA-1: ec05453a62940c541abb1b7ab75defa955422ccb SHA-256: 6c9886d94bae18639b2ff2236b2fb75da552898709a51d97632c18f578535c57
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by multiple heuristics as malicious, specifically for containing a large number of external links, one of which points to known malicious redirector infrastructure. The document body contains obfuscated text and URLs, including a link to 'ttraff.cc', which is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites.

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=chingamasam+album+song
    • http://ledifaro.simplycreativetreasures.com/uploads/1/3/1/6/131606271/25a91937a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102Hussain
    • http://smc.org.inhttp://smc.org.in
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pejuzesuloroxutebed.pdf
    • https://cdn.shopify.com/s/files/1/0434/1537/1932/files/kapafopi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0769/files/amd_radeon_r9_200_series_performance.pdf
    • https://cdn.shopify.com/s/files/1/0459/5800/4895/files/fijak.pdf
    • https://cdn.shopify.com/s/files/1/0430/5233/5255/files/cambridge_english_empower_a1_teacher_s_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4615/files/marketing_branding_strategies.pdf
    • https://cdn.shopify.com/s/files/1/0432/6745/7182/files/la_cantatrice_chauve_eugne_ionesco.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/vavonowegotujebipajekaka.pdf
    • https://cdn.shopify.com/s/files/1/0435/0047/0438/files/problem_solving_and_decision_making_skills.pdf
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/26037391758.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93527538138.pdf
    • https://cdn.shopify.com/s/files/1/0434/5852/7394/files/class_11th_chemistry_practical_book.pdf
    • https://cdn.shopify.com/s/files/1/0441/1087/2728/files/jivodumefu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7701/8524/files/vikaduxojuwebuvixe.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/
    • http://scripts.sil.org/OFL
    • https://gitlab.com/smc/meera/blob/master/COPYING

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052ab.bin
31e63bd8468f38fd0673912a3c59ca984a4ed5db6aa1ccb714191016831b39c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52AB 5048 bytes
font_01_sfnt_off0000639b.bin
3e81442a7831c12eca74e55d8f8e6cd516edb695faecf5693428f87e5e7d2e81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x639B 3228 bytes
font_02_sfnt_off00007040.bin
87c72d1c3058a0d8deb7a1ec25908747700f82dd2403af0bd28e1b0adf1e9ec6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7040 14044 bytes

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