Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40e8b84f718edfd…

MALICIOUS

PDF

32.5 KB Created: 2020-08-23 23:31:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9ae3f17099d806fbb0883b49ff87749b SHA-1: 63d682e44dd3a07a0bf3f340fef105844cfa25ba SHA-256: b40e8b84f718edfd1ea338767ff6cce5d9332a538cee10ecbbdf5729e8be669c
214 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to benign content, but one critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a financial accounting book and the malicious URL. This suggests a lure to trick users into clicking the malicious link, likely for phishing or to download further malware.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=financial+accounting+and+reporting+book+by+millan In PDF document text
    • http://files.inwiththeold.co/uploads/1/3/2/7/132741322/8998510.pdfIn PDF document text
    • http://rotetu.montoyaenglish.com/uploads/1/3/1/8/131857419/tonoderevixa.pdfIn PDF document text
    • http://bepesotob.woods-by-designs.com/uploads/1/3/2/8/132814977/zafugo-nizologejetolen-lojavixigowutut-laxesiwoludag.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/1/0430/7632/1434/files/why_cant_i_hear_people_in_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/26917805646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1827/2423/files/67815445746.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0625/4494/files/speer_reloading_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6202/4605/files/behaviorism_in_education.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7557/5709/files/the_basics_of_communication_studies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/occupational_therapy_intervention_for_autism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1378/2178/files/dukegirefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0014/3770/files/lugojogabobunemelipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/347843801.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
🗂 Part of campaign: stonehillcommunity.org 3 samples

Related samples 2

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_off00004294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4294 5476 bytes
SHA-256: 0c0b23319ee608b6811c172f0ac49f733fe9da78fd368c3236c41a1ec6f56eea
font_01_sfnt_off00005514.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5514 9324 bytes
SHA-256: 465f6af6c7bd7f1e7f7a9a5c3331347e1c6faed22e25c90526e05c54662683c2

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