Malicious PDF — malware analysis report

Static analysis result for SHA-256 16016dddb4f3d2b4…

MALICIOUS

PDF

43.7 KB Created: 2020-08-23 16:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 208c9c55c8d8eb7c47cb4c16fe174249 SHA-1: 282e5039dba04d5659d6e0fef0ea413d211bd54c SHA-256: 16016dddb4f3d2b40fba3708ce92c2f9206aa0c969f373e2ecc9460c16eef471
194 Risk Score

Malware Insights

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

This PDF document contains multiple embedded links, including one pointing to a known malicious redirector. The document body text, though partially obfuscated, suggests a lure related to an 'answer key' for a test, which is a common phishing tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=aakash+aiats+answer+key+test+2+2018, which is likely used to redirect users to a further malicious destination.

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.ru/pify?keyword=aakash+aiats+answer+key+test+2+2018 In PDF document text
    • http://files.meetingmilestonesinitiative.org/uploads/1/3/1/6/131606631/2489286.pdfIn PDF document text
    • http://xulup.1corinthiens15.com/uploads/1/3/0/8/130874113/lokuzanosafajovowok.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/1/0428/3521/4503/files/vebajotogukowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8384/2215/files/surikozed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5595/5613/files/tilurubazusakimorumagij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/jesorozijopaxolituxelikew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/marvel_movies_dubbed_in_tamil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9535/0684/files/18407750831.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3088/8094/files/46643736750.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5249/8070/files/mw3_hacks_xbox_360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2689/8344/files/kataxuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/fuguvabu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8638/8123/files/0._as_a_fraction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8711/9007/files/52767267969.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 6

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_off0000624f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 5508 bytes
SHA-256: 610bc0e5b31b0297b397aaf09274af1ac94cdbca198d380e983ea1f22f0e4232
font_01_sfnt_off0000750f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750F 14244 bytes
SHA-256: 1c0536514e3afbd27a8a4274c9f5d39c8ebfaff8f92303e89f59fba6354920c8

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