Malicious PDF — malware analysis report

Static analysis result for SHA-256 15c78dbba660c79d…

MALICIOUS

PDF

40.3 KB Created: 2020-09-16 18:11:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93e84ac725946dbe2679cef0f82cc874 SHA-1: 733aafa147f4c0f88a2ecfa51d5442e46357b85f SHA-256: 15c78dbba660c79da68959b6b68a1961c7aaedaa8816a6c4511afaaa9b6b596a
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, indicating a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://ttraff.link/wix?keyword=mike%2527s+huli+chicken+locations', is identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lead users to harmful content.

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.link/wix?keyword=mike%2527s+huli+chicken+locations
    • http://tiwax.blainesworld.net/uploads/1/3/0/8/130874063/teloratemetela.pdf
    • http://ziwibab.nienke-bodenheim.com/uploads/1/3/0/7/130740596/sasegiwu_repiku.pdf
    • http://files.littlecakes.nl/uploads/1/3/0/9/130969509/sujafixiw-mimudonevejagu-buzefa.pdf
    • http://files.finnmarkexpedition.co.uk/uploads/1/3/1/4/131453241/pivaxe.pdf
    • http://files.itslikemusictomymouth.com/uploads/1/3/1/3/131380008/gogafurer-pujata.pdf
    • http://files.artbyryanfinley.com/uploads/1/3/0/7/130738836/960481.pdf
    • http://files.demattee.com/uploads/1/3/1/4/131438155/jipezowuporarufutiza.pdf
    • http://files.jeninottphotography.com/uploads/1/3/0/8/130813601/05cc34bc4b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/8512/2984/files/mediacomtoday._com_sign_in.pdf
    • https://cdn.shopify.com/s/files/1/0432/8331/6891/files/excel_diary_template_2019.pdf
    • https://cdn.shopify.com/s/files/1/0459/9562/2559/files/62935213899.pdf
    • https://ed0175b0-9e65-4b4a-a1f5-a7cb65f3628b.filesusr.com/ugd/b42fd6_c114197a4ab64bcf8d5407930e8148e2.pdf?index=true
    • https://4326edc7-c153-4191-97a4-5523d6d2b860.filesusr.com/ugd/d8966e_c456a84547f64a379a2a6055e685bbb0.pdf?index=true
    • 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_off00005ff0.bin
d22f1ffba544dc0104f5de92cddbeaa643895822b3623a314c232ac30327220f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF0 4892 bytes
font_01_sfnt_off000070ab.bin
7d64a081db0cf19fac3aa86a0e2d5b9e2eb540585526c70e99bbc533e5902f1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x70AB 10440 bytes