Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c17602d25f9e190…

MALICIOUS

PDF

42.7 KB Created: 2020-08-07 17:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 065cdd09684627dd5d9a5909dc4e97cc SHA-1: 6ecddc2c9964e7561530363037c64a8b1fe3e2f0 SHA-256: 7c17602d25f9e190241901372de1d05ae49f4241057a85526ae8f52abddca5f4
162 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.com/pify?keyword=public+administration+books+philippines+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting a lure to a malicious site. The ML classifier strongly supports the malicious verdict.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=public+administration+books+philippines+pdf
    • http://sevoda.bbeboutiquellc.com/uploads/1/3/1/4/131407406/zakamu.pdf
    • http://files.bttau.com/uploads/1/3/0/7/130739949/dfa2d8ed9.pdf
    • http://files.threerivershomeinspection.com/uploads/1/3/0/8/130813888/tisurosaga_diremorekufedoz_datapubi_pogijajin.pdf
    • http://files.givehope2kids.org/uploads/1/3/0/7/130775405/e8353c375ea3d1.pdf
    • http://fininugam.texasthymeunit.org/uploads/1/3/0/8/130874493/3016162.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/83163262600.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/mufivesidoperugutew.pdf
    • https://cdn.shopify.com/s/files/1/0437/1441/2694/files/todumonadopajaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/3609/6150/files/pafaf.pdf
    • https://cdn.shopify.com/s/files/1/0427/7121/8588/files/zelabas.pdf
    • https://cdn.shopify.com/s/files/1/0441/0900/4952/files/star_of_xil_yeh.pdf
    • https://cdn.shopify.com/s/files/1/0431/5915/8946/files/93714366814.pdf
    • https://cdn.shopify.com/s/files/1/0437/9518/5824/files/texevemawaxiza.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0839/files/butotezomipunipuw.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_off00005a01.bin
daed59ddaf1814a8a75a52a630bb88adec46d4250cf5d887b1fc6563b274b75c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A01 5480 bytes
font_01_sfnt_off00006c63.bin
494fb1b5091d4d0c8c71f056024e1731cad7f9c183b763ce32d1f056d542501c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C63 10388 bytes
font_02_sfnt_off00008fe8.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE8 4324 bytes

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