Malicious PDF — malware analysis report

Static analysis result for SHA-256 81ad0aee63c1aa9c…

MALICIOUS

PDF

44.8 KB Created: 2020-08-12 04:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f56531bb8f991c5b7bcecac5b2d81667 SHA-1: 4e275702abfee6d85ddd5ff8e237d83478078e69 SHA-256: 81ad0aee63c1aa9c8a818b80379e7da2b4742415ec2df44d548f0f5402df24d9
202 Risk Score

Malware Insights

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

This PDF file contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be part of this malicious infrastructure. The presence of a 'download button' lure further supports the phishing or scam attempt.

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=movement+break+cards+pdf In PDF document text
    • http://files.njapphotos.site/uploads/1/3/1/4/131437307/kejibi-seboropetavet.pdfIn PDF document text
    • http://files.yourdayweddingsindiana.com/uploads/1/3/0/9/130969160/47ebb56a1e08d48.pdfIn PDF document text
    • http://pubak.mballew.com/uploads/1/3/1/3/131398404/nokezojosotuf.pdfIn PDF document text
    • http://xalik.1milliontitleones.com/uploads/1/3/1/3/131398367/rosomi.pdfIn PDF document text
    • http://tusefa.arcangeli-boats.com/uploads/1/3/1/3/131379877/6668248.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/1/0432/6001/8852/files/galaxy_note_8_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/quantitative_aptitude_formulas_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4356/8278/files/sipabigaloxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9488/2984/files/keziza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1386/4602/files/14630526900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2915/0368/files/13167030061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4980/3162/files/pixowamefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/muninawolojodiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8022/7747/files/37674849555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2176/9627/files/rolling_stone_s_top_500_albums.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/35929607011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/26485928330.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/tafetadixu.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_off00006358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6358 5280 bytes
SHA-256: 4333ea42a8d6103a26b1b2bf52e1cfc018f375a02144fb09d4b1fcff235fda8a
font_01_sfnt_off00007533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7533 10292 bytes
SHA-256: ed2aa5f50d3a12ec42608d1eaf53a73742e74068859bf37dc1c2535edc994613
font_02_sfnt_off0000986c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x986C 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3