Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d4c36cd066b85a7…

MALICIOUS

PDF

65.4 KB Created: 2020-08-23 22:02:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1356245268a22fdb5c9b9d1a703bfbbd SHA-1: 8d3164303c8a540740b85ce718bbe9b251488a87 SHA-256: 0d4c36cd066b85a7a35f77a542d98cd949b8c4059927c053fa7eca35c0460084
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains references to URLs and a call-to-action phrase, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a malicious campaign.

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.com/pify?keyword=adb+command+to+check+android+version
    • http://nepaxu.yesindustrialsupply.com/uploads/1/3/0/9/130969280/212746d.pdf
    • http://witudipa.dancingforjoy1.com/uploads/1/3/1/4/131409090/fovujobasago.pdf
    • http://files.myfmpac.org/uploads/1/3/2/7/132710797/2764759.pdf
    • http://files.newreligioncurriculum.com/uploads/1/3/2/6/132695543/detijulutesikesegora.pdf
    • http://lujuw.ttwproject.org/uploads/1/3/0/8/130814124/7128431.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/34231969511.pdf
    • https://cdn.shopify.com/s/files/1/0435/3097/7434/files/60522166677.pdf
    • https://cdn.shopify.com/s/files/1/0432/5706/9736/files/kfc_printable_coupons_2016.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/fivilelimarowonakez.pdf
    • https://cdn.shopify.com/s/files/1/0440/7613/8648/files/95589910684.pdf
    • https://cdn.shopify.com/s/files/1/0429/6084/7004/files/tipos_de_arbol_de_decisiones.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0108/files/79284118936.pdf
    • https://cdn.shopify.com/s/files/1/0430/2870/9539/files/73877173559.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7539/files/9450338440.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/how_to_install_pyserial.pdf
    • https://cdn.shopify.com/s/files/1/0435/7485/3793/files/xirezutu.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_off0000c1d6.bin
373fc8cac7430d47126144bd102192d8e4855ab309e1df2483c06ab116809419		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D6 5400 bytes
font_01_sfnt_off0000d3fd.bin
a8c1b162b72d349cbf15edeba53c3cba4440c000a98bb6a6fb22fd6a2d1591b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FD 10836 bytes

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