Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d563f740ec12cc…

MALICIOUS

PDF

42.1 KB Created: 2020-08-27 13:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a3586444a611ff4b6287e54f874cd897 SHA-1: d39398644c2bee849a94bf43be3bc6ffb54edbd2 SHA-256: d7d563f740ec12cce0d2e8cb7dad212271a5e5e4c5228282fffbed7c4dcf3f96
234 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, with one specifically pointing to a known malicious redirector. The document body contains garbled text and embedded URLs, suggesting it is designed to lure users into clicking malicious links. The primary attack pattern involves redirecting users to potentially harmful sites.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=mitoz+b%25C3%25B6l%25C3%25BCnme+slayt In PDF document text
    • http://files.szconstructionweimartx.com/uploads/1/3/2/8/132814241/55482d.pdfIn PDF document text
    • http://files.canadianinstitutenaturalhlthayu.com/uploads/1/3/1/0/131070792/bugexelokoj_goraguriri_tugutemesepesuk_kukejobexa.pdfIn PDF document text
    • http://files.audioallure.com/uploads/1/3/0/8/130874085/femuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/learn_arabic_language_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0473/8966/files/android_studio_recyclerview_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/46006914267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/desasuxizajosodosujuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2433/3472/files/60258434560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8672/5799/files/figanezefubumofudonon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/76802896213.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9661/2768/files/6773960285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5239/9773/files/87389989461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6025/7177/files/2682411716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4851/4215/files/latitude_5300_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/kuvibekalunasag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0244/5475/files/lusedotevixovikarek.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A4 5076 bytes
SHA-256: 1a4f3e7540f55dba8b300b5ed48979bd96b3ed0f494a4b3f1595c23a02f376ff
font_01_sfnt_off00006796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6796 11680 bytes
SHA-256: 784da4b66730af54f60ff6bcd3aca0510f1726d56fe5efd8bfb57744d8201173
font_02_sfnt_off00008bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BB9 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3