Malicious PDF — malware analysis report

Static analysis result for SHA-256 be42af39c0732f25…

MALICIOUS

PDF

40.5 KB Created: 2020-08-17 08:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a8f71399dcefbe23f0ec2a01f666ea44 SHA-1: 0b601f28247cc12b501a64831386881cfee5909d SHA-256: be42af39c0732f2501cda65a79fb702529efb878c032738a477cdd2f3e3db9ab
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text related to 'Dungeon defenders build guide' and includes the malicious URL. The presence of a link farm and a high ML classifier score further support the malicious nature of this document. The primary attack vector appears to be social engineering through deceptive links.

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=dungeon+defenders+build+guide In PDF document text
    • http://files.hulowmedical.com/uploads/1/3/0/7/130776646/pularupavojab.pdfIn PDF document text
    • http://dobat.mulvey.ie/uploads/1/3/0/7/130775162/741436cdb.pdfIn PDF document text
    • http://files.heartofperfusion.com/uploads/1/3/1/4/131407284/ff69cf13cf6.pdfIn PDF document text
    • http://files.ancestorsofmjr.com/uploads/1/3/0/8/130874162/nanigu_wijezerafe.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/1/0433/0687/7080/files/risekumomivedopela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/81295912327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3690/1527/files/22805824511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/lulozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/pocket_guide_to_critical_appraisal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9015/3365/files/risk_management_lecture_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/a_case_in_point_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebisineseboji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.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 3

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_off00006098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6098 5004 bytes
SHA-256: 9637eee87366addffb9d2fe629ca6b1ff15281f801ca7be2a731e34bc910e7ad
font_01_sfnt_off000071ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71AD 10468 bytes
SHA-256: e12f6bd6bc15e1500e68e09a03edf11b4dc679bd0622123242103a5536d82031

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