Malicious PDF — malware analysis report

Static analysis result for SHA-256 3122f2da2178719e…

MALICIOUS

PDF

33.9 KB Created: 2020-08-31 20:29:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c56e2d15bdeea6d3f35a85da4fd94443 SHA-1: c5f4fee0e7fb2f8f8c397a7e7418b4052a730fd1 SHA-256: 3122f2da2178719e78225548e603d0b7514a3ea7af2e085eda8171b90fea3ea1
154 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to 'slope intercepts and graphing equations review answers'. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a larger link farm, likely for SEO manipulation or to distribute malicious links. No scripts were extracted from this sample.

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/wix?keyword=slope+intercepts+and+graphing+equations+review+answers
    • https://cdn.shopify.com/s/files/1/0437/5461/9041/files/culinary_terms_a_z.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7214/files/nelisagupufujivi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6463/files/super_funny_ringtones.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/define_inventory_management.pdf
    • https://cdn.shopify.com/s/files/1/0437/2617/6407/files/puda_building_bye_laws_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/91218838459.pdf
    • https://cdn.shopify.com/s/files/1/0432/1751/8751/files/bubexizexil.pdf
    • https://cdn.shopify.com/s/files/1/0431/7315/0869/files/goldtooth_wow_classic.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/99999806950.pdf
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/famidunikexunoge.pdf
    • https://cdn.shopify.com/s/files/1/0459/0144/7322/files/play_store_apk_for_android_tv.pdf
    • https://cdn.shopify.com/s/files/1/0434/0747/4844/files/wugegesorunuped.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_off0000458c.bin
c7fff371939cc503d332e242f6a27cd3e2bfa26c0909470ef1d34bb029d628e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x458C 5716 bytes
font_01_sfnt_off00005905.bin
14ad162cc950a454c977464334d69c0f91af9845df7424f0a05abe0297b831b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5905 9820 bytes