Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c6cf66b995c4c8…

MALICIOUS

PDF

44.8 KB Created: 2020-08-29 06:18:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0f9f19b222a8acc142e76374b7981b10 SHA-1: 7d3080ff9134ca8b8b660117f7a831e8804d7594 SHA-256: 12c6cf66b995c4c807b8fb6a43393c22ead1ffc5ada32e9531917eb35ffd51df
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, creating a link farm. The primary link, however, directs to 'ttraff.cc', a known malicious redirector. This suggests the document's purpose is to lead users to malicious infrastructure, likely for further exploitation or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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/wix?keyword=miss+fortune+fan+art
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/rijebenelulewoso.pdf
    • https://cdn.shopify.com/s/files/1/0447/3857/6533/files/acethinker_video_downloader.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41448402009.pdf
    • https://cdn.shopify.com/s/files/1/0434/0908/0477/files/misuvosefu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0645/2127/files/wow_patch_notes_7._1.pdf
    • https://cdn.shopify.com/s/files/1/0436/4071/7462/files/algebra_1_common_core_student_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/8967/3888/files/voxife.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/68777008692.pdf
    • https://cdn.shopify.com/s/files/1/0438/1097/9997/files/49126635747.pdf
    • https://static.usrfiles.com/ugd/b8c837_c046e6c9db3f4ae79f7e44e1e978235e.pdf
    • https://static.usrfiles.com/ugd/b8c837_11f23be4674c416ebfa7e960a66256f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_a4c5a4c552b24ff7ade7d7a220749a44.pdf
    • https://static.usrfiles.com/ugd/b8c837_e564486daba642e488508a319e5cdba4.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/lulupudavilibebibekuja.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/95009619853.pdf
    • https://cdn.shopify.com/s/files/1/0429/1143/2857/files/mavizarelifapivos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5523/4710/files/business_letter_writing_books.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b7f.bin
8934731fb67e1c39d4d6b2c991d14f55dd4c295548f80c935b18cd44c9e23642		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7F 4616 bytes
font_01_sfnt_off00006b3c.bin
c7a8272724ec420d964b03343dda600e11f22ba4ad19fffc1bb161e42d3f734e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3C 14336 bytes
font_02_sfnt_off0000981a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x981A 4324 bytes

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