Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc78817bfd2924e…

MALICIOUS

PDF

39.8 KB Created: 2020-09-02 18:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bfd6eefd22b6026a810102872bb73d7e SHA-1: fc01833a752f5bba6089975d9fc899f8d4c2f971 SHA-256: 5cc78817bfd2924e8f7c246aba0c0d93f5d2df2eda54dfd72551628cd6340d58
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a malicious redirector link disguised as a download for 'game dev story apk free full version'. The link leads to 'ttraff.link', which is known malicious infrastructure. The document also contains a large number of links to Shopify, likely part of a link farm to improve SEO for malicious content. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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.link/wix?keyword=game+dev+story+apk+free+full+version
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/1033/2571/files/fybsc_biotechnology_books.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/baby_driver_soundtrack_320kbps_zip.pdf
    • https://cdn.shopify.com/s/files/1/0437/3977/5128/files/industrial_maintenance_technician_test_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/1540/5725/files/vinubovuko.pdf
    • https://cdn.shopify.com/s/files/1/0437/7912/9501/files/wiboser.pdf
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/4613933261.pdf
    • https://cdn.shopify.com/s/files/1/0433/7090/5750/files/biruporuneraxojeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/kikaxaner.pdf
    • https://cdn.shopify.com/s/files/1/0464/5968/2984/files/voltage_divider_calculator_software_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/9614/6074/files/demojub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/animal_cell_culture_medium.pdf
    • https://cdn.shopify.com/s/files/1/0433/7192/1571/files/xutonoxezifipefaregef.pdf
    • https://cdn.shopify.com/s/files/1/0438/7107/6520/files/tixenokoxetajunak.pdf
    • https://static.usrfiles.com/ugd/f0e51d_36b381a90df0430a869e98a223f81f3c.pdf
    • https://static.usrfiles.com/ugd/4c1554_0f3750bffa4146198b88684be06fb395.pdf
    • https://static.usrfiles.com/ugd/41f880_2491a722e4974cda9a3ac2c399841821.pdf
    • https://static.usrfiles.com/ugd/b8c837_d785fd2c6c6a4312afa904e145d69a27.pdf
    • https://static.usrfiles.com/ugd/2b25b5_07c566108e424551bf4a1847ace87efb.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005bf0.bin
f2c669c29a77ddaec57d0393a0c405f8686bfa23f197236249c136e243400bd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF0 5444 bytes
font_01_sfnt_off00006e73.bin
da1b303fe3f2317b105f1e6f7baaccf9213f4f4d4c102fd53c6a3c1c63fab6b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E73 10388 bytes

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