Malicious PDF — malware analysis report

Static analysis result for SHA-256 9239d2d736779d52…

MALICIOUS

PDF

38.7 KB Created: 2020-07-12 01:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd36c745f4c958482af14d85fd70b943 SHA-1: 2da4782dc7f82c17cba1f2dde991e4bca439d4a4 SHA-256: 9239d2d736779d522f3036aad80de704cc6eadfedcc47edc235617ed21f91adb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, however, redirects to a known malicious infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'best mp3 player 2017' and the malicious URL, suggesting a lure to a potentially malicious site. The ML classifier strongly indicated maliciousness.

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=best+mp3+player+2017
    • http://files.katiewoodsdesign.com/uploads/1/3/1/8/131857112/16b33a.pdf
    • http://files.jewellhjohnson.com/uploads/1/3/2/8/132816158/252b1d3f634b0.pdf
    • http://files.ballisticarmordefense.com/uploads/1/3/2/7/132712558/ac086b132e73.pdf
    • http://files.insectcollective.com/uploads/1/3/1/3/131379060/pesemutalo-mipiloninevafa-kowaja.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/loxutiwijadewafulon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pepefawabibuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatajimawi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mowelikuzamutaj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55079075607.pdf
    • https://tovewar.files.wordpress.com/2020/07/99254446365.pdf
    • https://ditutelewiro.files.wordpress.com/2020/07/saxip.pdf
    • https://gazalimapifo.files.wordpress.com/2020/07/kebiluguvabize.pdf
    • https://wazuxopegan.files.wordpress.com/2020/07/6313682473.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/punuvejevofitipepimadawe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.pdf
    • https://cdn.shopify.com/s/files/1/0432/6375/4408/files/91489501006.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/lubifoferosumas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/lurijexikixe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/19441108854.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jokesinoximirupabujikupoj.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/sezonizumijirezexelote.pdf
    • https://cdn.shopify.com/s/files/1/0430/7392/9378/files/14189225094.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_off0000594c.bin
ac382a79c69d84545fba880b0e7ce70746b5e81a5dfa32d3ecbecf16f7297fef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594C 5208 bytes
font_01_sfnt_off00006b0c.bin
dfb3fd3ed50e575e211e5d383409b522f811fdbc9c621992f15b94ef8bd58684		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0C 10204 bytes

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