Malicious PDF — malware analysis report

Static analysis result for SHA-256 3198ec087b9a6908…

MALICIOUS

PDF

45.2 KB Created: 2020-08-04 19:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fc650239d52a014fe4c8bdceecde8ee SHA-1: 913a215b6ef35a2c408135cf02c370836013131d SHA-256: 3198ec087b9a6908d0e5034ca6d869d4a44e9018af46d300f7a72363eb95fc47
152 Risk Score

Malware Insights

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

The PDF contains a link to a redirector (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, appears to contain text related to a 'chronological study bible new king james version pdf', suggesting a lure. The presence of a link farm heuristic indicates the PDF is designed to host numerous external links, likely for SEO poisoning or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=the+chronological+study+bible+new+king+james+version+pdf
    • http://files.templerestored.org/uploads/1/3/2/7/132740352/5c0ff210a978.pdf
    • http://files.corbettdc.com/uploads/1/3/0/7/130776268/b961e82d73aff.pdf
    • http://files.gallipolisriverrec.com/uploads/1/3/1/1/131164009/10ca4b39aad.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85450973079.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/audience_research_journal.pdf
    • https://cdn.shopify.com/s/files/1/0431/8570/1019/files/14556179541.pdf
    • https://cdn.shopify.com/s/files/1/0432/0624/6557/files/abraham_lincoln_quotes_on_leadership.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/vubidunegalapafugo.pdf
    • https://cdn.shopify.com/s/files/1/0432/1745/3211/files/sepopelefisuv.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/74862227974.pdf
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/all_i_do_is_win_clean.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3126/files/kinafeneti.pdf
    • https://cdn.shopify.com/s/files/1/0440/7564/7128/files/ncert_solutions_for_class_11_biology_chapter_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.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_off0000702c.bin
3cd315854ceeb44d941e8adcb53285f6f07f75bc09110adf4376e37282702912
pdf-font-stream PDF embedded font (sfnt) at offset 0x702C 6052 bytes
font_01_sfnt_off000084ba.bin
975e89ad311f1b9f39bdc8e67c1d12fb428780cdaa208930d558412cc723b91a
pdf-font-stream PDF embedded font (sfnt) at offset 0x84BA 10144 bytes