Malicious PDF — malware analysis report

Static analysis result for SHA-256 6642b7c416be6eff…

MALICIOUS

PDF

39.5 KB Created: 2020-08-08 00:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f96498bc6bb31bb6534e07eca6cc15e3 SHA-1: ac5a783fe766205d4dba01904d5e7ceaa6c867d0 SHA-256: 6642b7c416be6eff34c1a6de742aed626c036a705b578e7aca4cb19a74259e3e
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a critical finding of a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that is also flagged by heuristics. This suggests a phishing or scam attempt using a link farm to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=biography+poem+template+pdf In PDF document text
    • http://files.bassriver-nj.org/uploads/1/3/1/1/131163859/kugoboraxodorerijap.pdfIn PDF document text
    • http://files.gangneungtours.com/uploads/1/3/1/8/131857117/677169.pdfIn PDF document text
    • http://files.trueviewwisc.com/uploads/1/3/1/0/131070723/nutim_fisaributu_tarifo_lisosusoginujus.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/1/0449/5409/1675/files/functional_communication_profile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/68900498715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5748/6753/files/digimon_masters_online_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2760/3354/files/bestiariusz_sowiaski.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1137/5267/files/62785376251.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/lodadimupuzisuxiwikiwado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/dawej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2669/4822/files/tirakakakezizanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1270/1854/files/35065276707.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7904/9121/files/tubomaroligoxodom.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 8

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_off00005c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7A 5428 bytes
SHA-256: cb7ba1d185582ded0fc7f98a9d5ae15d52fb0c04496191541d6f57f2f88aadc5
font_01_sfnt_off00006ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED2 10176 bytes
SHA-256: 8fc5c7ee10011295fe6e63879004a8ec01548325d209e692140da6abe2258541

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