Malicious PDF — malware analysis report

Static analysis result for SHA-256 9140d3e11867c2b3…

MALICIOUS

PDF

56.1 KB Created: 2020-08-05 02:32:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5bcd18c4735058c790fcadaad429d4b7 SHA-1: 30fe42c9a2802ee6b6e369965aa0e88d364a764d SHA-256: 9140d3e11867c2b3f71e978d868e0667e1a8e7a0cc6f188918303701f517c4dd
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple links, including one that redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains text related to PDF conversion and a URL that appears to be a lure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the presence of a link to a malicious redirector, and PDF_SEO_LINK_FARM indicates a large number of links, likely for SEO manipulation or to host further malicious content. The SE_DOWNLOAD_BUTTON heuristic suggests a call-to-action, reinforcing the lure aspect.

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=best+pdf+to+word+converter+online+for+free In PDF document text
    • http://files.matthewfuhrmann.com/uploads/1/3/0/7/130776265/233465.pdfIn PDF document text
    • http://files.advance-drivertraining.co.uk/uploads/1/3/2/8/132814030/169928.pdfIn PDF document text
    • http://wusevugi.reainfocus.com/uploads/1/3/2/8/132815002/5153f.pdfIn PDF document text
    • http://files.stensolo.com/uploads/1/3/0/9/130969682/kinegodimeverof.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/1/0434/4512/5281/files/free_word_roundup_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8491/4583/files/nalomaxaraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/83990444493.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/gusufuregatino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4432/1945/files/alerta_amber.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4830/4797/files/40748595749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/38112797298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0799/1208/files/quantum_mechanics_an_accessible_introduction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3883/3816/files/92545372336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81603963226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7002/files/relobowozidujume.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8729/8714/files/35448307111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/subnautica_charge_batteries.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/0834/7547/files/medicinal_properties_of_andrographis_paniculata.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E00 5140 bytes
SHA-256: 5a1fb100828e8996ba78deedda278712dceadd429e2e23566eadb7fc2b2bc69e
font_01_sfnt_off0000afae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAE 10220 bytes
SHA-256: d2afd44c40f3b12db4d77371f2c163cad5c5e64f2484b492b556a64b66fe5054