Malicious PDF — malware analysis report

Static analysis result for SHA-256 99dad68e3adb3694…

MALICIOUS

PDF

38.4 KB Created: 2020-08-07 01:06:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 196694feb04991dc9615bca390e8a491 SHA-1: 7b839596c2c7f809f842ec2faf7aaf8d6e7fee8e SHA-256: 99dad68e3adb36942d1f4dcf82a098e15b7225e26e0eb88f9e9789a8b83427ee
194 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. Additionally, it contains a large number of external PDF links, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a malicious site.

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.com/pify?keyword=physical+science+grade+11+text+book+pdf In PDF document text
    • http://rerek.opendoorsspokane.com/uploads/1/3/1/4/131453540/josevado-zelikoraxel.pdfIn PDF document text
    • http://files.charlottecrone.com/uploads/1/3/1/8/131871621/8099088.pdfIn PDF document text
    • http://files.boyertownareamulti-service.org/uploads/1/3/2/7/132740619/af77c51.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/1/0430/7881/1797/files/rizatafemolexapu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4571/4077/files/calcium_gluconate_davis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8062/0963/files/little_league_baseball_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6289/4485/files/mikumowuxarebutatexoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4472/0040/files/marketing_strategy_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5547/1002/files/edema_paru_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/netulojifired.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/monatifebebivaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/kutugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/9800242408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/57746542114.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7522/3200/files/zugiwegowezudoketipev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/28603075132.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: charlottecrone.com 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_off00005540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5540 5844 bytes
SHA-256: 6de7efaef980ccc5a49226670d4cf618749e0ef4a3ff859f6be6c9ea4fb0d06e
font_01_sfnt_off00006931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6931 9744 bytes
SHA-256: cd1852bebcc1059275634c59e72bf0da03ab1d76214d2c371b1871836a7a57d5

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