Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d92ce1bc3e1afc…

MALICIOUS

PDF

39.6 KB Created: 2020-08-14 08:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7df4eb75d34b2e66bf4c1c8b4acb23da SHA-1: bdb25823961ab8ea01e3a748a24f309239e9143a SHA-256: 16d92ce1bc3e1afc8a0e6455dc7938a645f845bb014e4d4523a105492abaab1d
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.cc) that is flagged as malicious. The document body, though heavily obfuscated, contains the same URL and a benign-looking PDF filename, suggesting a lure for users to download a malicious file. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/wb?keyword=modals%20of%20necessity%20and%20obligation%20pdf In PDF document text
    • http://files.jcaweb.net/uploads/1/3/0/7/130738991/bikopomotul-jumuvizanebuw-dijufup.pdfIn PDF document text
    • http://leluja.centralcoastwineworks.com/uploads/1/3/0/7/130775085/mufuvefi.pdfIn PDF document text
    • http://files.gingerschultheis.com/uploads/1/3/0/7/130739126/7046234.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4841/8973/files/gizapidejedagigarujemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3626/2052/files/fishing_knots.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/berasofexokinelefilemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5526/8519/files/zewaxezedawutut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6829/3287/files/61417796866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0253/4822/files/biafran_war_in_nigeria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7156/9046/files/dezelaraxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0935/1578/files/92077331197.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/71407097719.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7381/4172/files/91212918304.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1992/7713/files/50902471554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0900/0103/files/vukikudekalasazisojigimi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C69 5476 bytes
SHA-256: e8fd564f5b22f238fc26ccea2672d5c5b54c4e4ec4d88c88d3960aca12580c3d
font_01_sfnt_off00006f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F2F 10060 bytes
SHA-256: 1a0fd9b224ef65dc25eb09cc0b7733c6c8f51cec4514e8bdb3dd3dc56d5ce3b8

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