Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6f4d48c3b9e973…

MALICIOUS

PDF

44.7 KB Created: 2020-08-20 06:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d186519d926e7ddc43e7d61aa355b93b SHA-1: f0ae36a74751d1b3fa5cf39369811fc36e7d12ce SHA-256: 7e6f4d48c3b9e973b963394ae097c812c18f7d6d65a0c4c6024c903c15451e93
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The embedded links, including one to 'ttraff.com', suggest an attempt to lead users to potentially harmful content or phishing 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.com/pify?keyword=core+muscle+strengthening+exercises+pdf
    • http://tavanarix.kpcecala.net/uploads/1/3/1/3/131383770/kitafituvozowusale.pdf
    • http://files.mentalhealthgps.org/uploads/1/3/1/1/131163872/5a5267d28c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7247/0686/files/17904700367.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/images_from_google_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0462/1287/4394/files/34878212248.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/jquery_ui_cdn.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/patixukelikugopenolosawiv.pdf
    • https://cdn.shopify.com/s/files/1/0436/4494/4542/files/kizikutavutupu.pdf
    • https://cdn.shopify.com/s/files/1/0449/7191/7471/files/connectors_list_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/pazodozezusumak.pdf
    • https://cdn.shopify.com/s/files/1/0432/1614/2497/files/gumivufedobokatit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30617095305.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_off00007201.bin
32d7f9694bc20687d866a29552abed2c6725bc0abb198f9d8fd3dff05f2dcfff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7201 5332 bytes
font_01_sfnt_off000083fa.bin
5cde1d892221991689abd3c1a499bec9e48ca1408da4b8d25168e764a9669da4
pdf-font-stream PDF embedded font (sfnt) at offset 0x83FA 10036 bytes