Malicious PDF — malware analysis report

Static analysis result for SHA-256 b708bd341ff6e66d…

MALICIOUS

PDF

52.3 KB Created: 2020-08-04 02:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5eee28b84601da72d2ddca167c8ca753 SHA-1: 2901989e92b7d51e88d0246d2c14d972a32f32d9 SHA-256: b708bd341ff6e66dd6d524f4befae66768e6f934ac2b1ffddb925e8a4f04c83a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of embedded links, with one pointing to a known malicious redirector. The heuristic firings indicate that this PDF is part of a link farm, likely designed for SEO manipulation or to distribute further malicious content. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf.

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=berodual+ulotka+pdf In PDF document text
    • http://files.theepyawards.com/uploads/1/3/1/3/131381376/fd2007d5d.pdfIn PDF document text
    • http://mupakor.oldtel.com/uploads/1/3/1/4/131406717/d1f84f5dfd8789.pdfIn PDF document text
    • http://files.sanctuaryaplaceofrefuge.org/uploads/1/3/1/4/131409309/604309.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/1/0428/8151/5673/files/duxidujoreroz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3353/4357/files/tirulexutudaboxosobiruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0581/files/bazemodapiseviluvufasomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8233/3851/files/adda247_reasoning_book_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kopamidije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5533/3027/files/2772972591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7815/6449/files/64156914272.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65587220918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9927/3882/files/goldfinger_99_red_balloons_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9736/7452/files/12868287260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3095/3627/files/zafili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4942/5823/files/bharata_muni_natyashastra_rasa_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/alphabet_letters_images.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/6090580804.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 4

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_off00008f3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3B 4968 bytes
SHA-256: a1401ea18cf436c6bb9b275bf545edcc6fc53fc48a47bedd488dff427092787d
font_01_sfnt_off0000a035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA035 10624 bytes
SHA-256: 078b20db9470a7792424c62180b2bb4091de82a4050993256fbcd2d2d0e045d8

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