Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da1e001578ed37f…

MALICIOUS

PDF

46.9 KB Created: 2020-08-11 20:52:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60907bffc4ffc48cd6035e3a1910c554 SHA-1: ca89e72989535ccf91c55e0da80f0e3dca03c47a SHA-256: 0da1e001578ed37fb48afee178f7920ad11e28af7e1116a336a8a7b0a1aad4d9
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is presented within the document body, disguised as a download link for a 'caliper mitutoyo pdf'. The PDF also contains a large number of external PDF links, many of which are generated and potentially used for SEO manipulation or to host further malicious content. While no scripts were extracted, the presence of a malicious redirector and the SEO link farm strongly suggest an attempt to lead users to malicious sites, likely for phishing or malware distribution.

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.cc/pify?keyword=caliper+mitutoyo+pdf
    • http://jokapi.hilltoplife.com/uploads/1/3/2/8/132814930/4792477.pdf
    • http://files.gemsandequipment.com/uploads/1/3/2/3/132303170/suwasenatex.pdf
    • http://wixifimew.getfitz4life.com/uploads/1/3/0/8/130873995/fozirogotek_xezoporo_debowuno_sisan.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0391/2098/files/pegetizofopakiros.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/suzofarumiwobegabesorekiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/4635/3561/files/boosie_bad_azz_album.pdf
    • https://cdn.shopify.com/s/files/1/0428/5736/5670/files/the_aquarian_teacher_yoga_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/auditor_fiscal_do_trabalho_edital.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/legally_blonde_soundtrack.pdf
    • https://cdn.shopify.com/s/files/1/0430/1409/5001/files/4d_printing_technology_seminar_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/7138/1405/files/xufolimedivafiwiwosopile.pdf
    • https://cdn.shopify.com/s/files/1/0430/9853/8151/files/80872442393.pdf
    • https://cdn.shopify.com/s/files/1/0430/1740/4573/files/bufotof.pdf
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/religious_festivals_in_the_philippines.pdf
    • https://cdn.shopify.com/s/files/1/0435/0686/0187/files/64239161302.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_off00006ebc.bin
564def137ff03d44b01dea663ab81ca488d4f79a3b4ef727ccbaa4e4c5536153		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EBC 5016 bytes
font_01_sfnt_off00007fc4.bin
8eac03b50aee424c49a9a41ac57ab93f74f65c0890ce59126c0e4e1d0608f9d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC4 15208 bytes

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