Malicious PDF — malware analysis report

Static analysis result for SHA-256 7321796b84386e59…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 02:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 187d9bafe86e22be9b52d6ae85726630 SHA-1: b9eb43ef0504fe845370d1b6f916517e5c58dcb5 SHA-256: 7321796b84386e592d60b08a72be99fa99adb6d76112280c6149b84c29e2ea07
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of this redirection scheme. The presence of numerous external PDF links suggests an attempt to create a link farm or distribute further malicious content.

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=ceroplastes+floridensis+pdf In PDF document text
    • http://files.holyspiritchurchde.org/uploads/1/3/1/3/131380756/jugozasedevel.pdfIn PDF document text
    • http://files.kyushoacademy.com/uploads/1/3/0/7/130776200/6018301.pdfIn PDF document text
    • http://files.ofsilvermills.com/uploads/1/3/1/4/131482915/nusoramalawujezefok.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/1/0432/1044/0859/files/dd_form_626.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3759/7596/files/89494207483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/68797052096.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4575/6833/files/28500739163.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8775/7461/files/90338920657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/47311545592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4937/6161/files/cracking_the_pm_interview_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/5113687722.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/pewajijimodosonurek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/fusuwilorejesaxunofebox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/395667921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dagezaluvonanapukinuwit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7592/0282/files/examples_of_python_programs.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 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_off00007373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7373 4940 bytes
SHA-256: c5c5418dbb4b9916aae8cf8627c1493bf3ca4eb8b5e4d187958d1d9b4db6a6f4
font_01_sfnt_off00008445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8445 9944 bytes
SHA-256: e14ce95281aa39dc5074bf75afb46d00b6e73c25b91e826c3418eb8c064fe927

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