Malicious PDF — malware analysis report

Static analysis result for SHA-256 17ed6443e226e016…

MALICIOUS

PDF

50.2 KB Created: 2020-08-12 02:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee42992480b4e0d23306fee1e808cd5a SHA-1: e4b74e881a5bfeae018ec659cb8906c22b501f36 SHA-256: 17ed6443e226e016cb266ea109a83497938d4b901c78d462e6c09f5da1801589
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources, suggesting a link farm or redirection attempt. The primary URL, 'https://ttraff.com/pify?keyword=envenenamiento+por+picadura+de+abeja+pdf', is identified as a malicious redirector. The document body, though partially corrupted, contains text related to bee stings and the authoring application, likely a lure to encourage link clicks. The ML classifier strongly flagged this PDF as malicious.

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.com/pify?keyword=envenenamiento+por+picadura+de+abeja+pdf
    • http://jitok.gt-agv.com/uploads/1/3/0/9/130969862/4671097.pdf
    • http://jisamo.chappaquaptastem.com/uploads/1/3/2/8/132816066/kifabivonuzup.pdf
    • http://files.callidevalleyvet.com/uploads/1/3/1/4/131483281/wivotata.pdf
    • http://jiruvu.keysofawakening.com/uploads/1/3/0/7/130775934/ruravojaberuborige.pdf
    • http://files.dappledblue.com/uploads/1/3/2/6/132695472/gimigamosixafudu.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9906/2426/files/add_bookmarks_to_adobe_reader_dc.pdf
    • https://cdn.shopify.com/s/files/1/0427/3173/3159/files/navav.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/91769624421.pdf
    • https://cdn.shopify.com/s/files/1/0429/3070/0455/files/nebafisowegigusamoxiwolep.pdf
    • https://cdn.shopify.com/s/files/1/0438/1730/4226/files/36001123957.pdf
    • https://cdn.shopify.com/s/files/1/0437/6169/6925/files/karexenolitigu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4364/2773/files/material_para_aprender_ingles_basico.pdf
    • https://cdn.shopify.com/s/files/1/0428/0595/2671/files/1236824933.pdf
    • https://cdn.shopify.com/s/files/1/0440/8921/3093/files/51121425470.pdf
    • https://cdn.shopify.com/s/files/1/0432/0716/4064/files/xuvamituxatumisaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/0757/4179/files/68392092561.pdf
    • https://cdn.shopify.com/s/files/1/0437/0920/2597/files/gemababu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5469/3541/files/algebraic_identities_for_class_8.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_off00007705.bin
5bebe7ec6d0cd3515073ab9333099094c6efce7cc778dc8f4bce0398f6bfd69c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7705 2736 bytes
font_01_sfnt_off0000827c.bin
af0664c756666abf21e70738be5a0a35ac6b139619bb278ee16cecac857bff3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827C 5324 bytes
font_02_sfnt_off00009489.bin
44a0e89dca4decff922b83af0b291a3ea44ac16a9f13fda6ae3453f78dfecc02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9489 11252 bytes

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