Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6865edf2853652f…

MALICIOUS

PDF

38.4 KB Created: 2020-07-28 19:37:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d5fb4031635230575ce10d64f6e48610 SHA-1: 2a895a827563b6c6836670c0317a8590227e4de6 SHA-256: f6865edf2853652f9630f115c8839233062da1d6dce9bb25e28f3f23b3c407aa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a high number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=diggers+hydrochloric+acid+safety+data+sheet', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to a safety data sheet, intended to trick the user into clicking the malicious link.

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.ru/pify?keyword=diggers+hydrochloric+acid+safety+data+sheet
    • http://files.sillassenhalf.com/uploads/1/3/0/9/130969555/bevijidu.pdf
    • http://files.ellianajolenasbows.com/uploads/1/3/1/4/131410007/de11df4058218c.pdf
    • http://files.lighthousetravel.org/uploads/1/3/1/4/131482886/xuwuvazezadipoj.pdf
    • http://files.insitju.com/uploads/1/3/1/4/131437249/zutomatimixega.pdf
    • https://cdn.shopify.com/s/files/1/0427/7148/0742/files/nowunaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/5398/1594/files/lerir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8909/3018/files/89205970434.pdf
    • https://cdn.shopify.com/s/files/1/0429/6281/3084/files/puberidalemadubasenas.pdf
    • https://cdn.shopify.com/s/files/1/0436/4192/9886/files/58354385231.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/rokokeviguzupom.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/zuvesibobusojedivekariroz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6893/8658/files/95279073350.pdf
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/zubanazirojiximilave.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mubexuv.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/10139115563.pdf
    • https://cdn.shopify.com/s/files/1/0430/7759/9383/files/kujusasikam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3534/files/domiziwomidigefivejix.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/rofinamoxupimilutagufozo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000058f4.bin
7832c7a98244c012e1d0341c629a5b3dbcb1e1e121dd8a9276ca2dd930bec6f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58F4 5064 bytes
font_01_sfnt_off00006a4c.bin
12f8957022e3b68cc16874ae7737958eae35d5861003b1d95693d7f4e96abdf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4C 9900 bytes

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