Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9332278b15972d…

MALICIOUS

PDF

42.6 KB Created: 2020-07-26 22:39:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 09e7651dff3cf2eed392965b8e0bcc50 SHA-1: 3b2d1853f9fb42139ce636c09f4da3b88cc1174e SHA-256: 6e9332278b15972dc52b53b38bf794d2a2b8ef95ad823c723afd7abceb0e5abd
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with one critical heuristic identifying a link to known malicious redirector infrastructure. Another critical heuristic flags the PDF as part of a link farm, suggesting an attempt to manipulate search engine results or distribute malicious content. While no scripts were extracted, the presence of embedded URLs and the overall structure strongly indicate a malicious intent to redirect users to harmful sites.

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=picture+writing+worksheets+for+grade+5
    • http://files.avianoreunion.com/uploads/1/3/0/9/130970022/6cce6ccd79358de.pdf
    • http://files.scrippsnorthstar.com/uploads/1/3/1/3/131383297/97ca23c8fd6.pdf
    • http://files.jchsmediacenter.com/uploads/1/3/0/8/130814423/dagitasek.pdf
    • http://files.agelessangelstraining.com/uploads/1/3/0/7/130775387/4006389.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/2280/3366/files/kizuwemojebadunavasufezaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0429/1916/6105/files/penuradetezujire.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/51416986263.pdf
    • https://cdn.shopify.com/s/files/1/0431/6371/3690/files/8157320493.pdf
    • https://cdn.shopify.com/s/files/1/0434/3585/1928/files/56728782064.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/dukaropa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5316/1367/files/24280117612.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/kivowuzumubabeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/51378049941.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1223/files/35770219893.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/12641590179.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/bujiwexuninijazelajetekud.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006564.bin
d122ccecde71f9a3f963a49ee0907181e3dc7086500472b787bc7a39dc2e5ee9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6564 5416 bytes
font_01_sfnt_off000077de.bin
bf111f49a75186f1e376a80651570fba01bce97aba288f884a35778b44f93afe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77DE 10352 bytes

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