Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dd82c48d2555173…

MALICIOUS

PDF

43.3 KB Created: 2020-08-05 10:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e507379d9e7d6b329b6e25052da7bff1 SHA-1: 515f2188b87e1c536415541d681ce7f6f14437a5 SHA-256: 1dd82c48d2555173800ff9b0d73c3eb24de54d43ce41d1798f61ca6f12b9c1c2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains numerous embedded links, with the primary link directing to a malicious redirector. The document body, though heavily obfuscated, contains text related to 'human anatomy and physiology' and the tool 'wkhtmltopdf', suggesting a lure to disguise malicious content. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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.cc/pify?keyword=human+anatomy+and+physiology+of+nervous+system+pdf In PDF document text
    • http://files.niassestudios.com/uploads/1/3/0/8/130874318/b919e96e4ba.pdfIn PDF document text
    • http://files.maternalinsights.com/uploads/1/3/0/7/130775378/palozawoxamiralez.pdfIn PDF document text
    • http://files.justpeoplelikeus.com/uploads/1/3/1/4/131437862/femidopuf.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/1/0434/2513/6792/files/83637173022.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1808/1688/files/ritesemupokunepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9291/8947/files/dolopipuvijolejoxamulunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1507/6002/files/fobalupem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8711/6965/files/43983716072.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/d_d_wererat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7199/5030/files/51589618698.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/bujezuvatidako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3269/9295/files/the_iliad_lombardo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4767/3253/files/jugosugexagazamilagikos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2534/9273/files/gobeneru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9977/5381/files/bebogaxuzinepurorekimonaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7259/2801/files/jokifebigoginujavuxinozaw.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_off00006758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6758 5580 bytes
SHA-256: 3a0a06f7d1ef1ef620e1a8b6a6b57099b698b3bec70303a7cf70b485a1e4b92c
font_01_sfnt_off00007a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A31 10592 bytes
SHA-256: 2e9e6c880b81745beeff7279f2dde96da10442a64803dcd340207109de08db2b

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