Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e96379543455af…

MALICIOUS

PDF

40.8 KB Created: 2020-08-03 12:16:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2fafc9fe70b882879812c12fdf443f7a SHA-1: cbeac924a74671d87afcebac37ee881ba665ea59 SHA-256: b7e96379543455af64a8e19647bbb1cc5805fb237279993aaf5a23a031f61e24
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious content, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though obfuscated, contains text suggesting it is a worksheet, which is a common lure. The primary malicious IOC is the redirector URL, which is likely used to deliver a secondary payload.

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=ordered+pairs+worksheet+pdf In PDF document text
    • http://kogosa.ispinwood.com/uploads/1/3/1/4/131408100/momemi.pdfIn PDF document text
    • http://files.bambooartscenter.com/uploads/1/3/1/8/131857071/pujeriwetid-napofemerumaw.pdfIn PDF document text
    • http://files.isr2020.org/uploads/1/3/0/7/130775102/topafisitas_mopakufap_lorozok.pdfIn PDF document text
    • http://files.saltdancecompany.com/uploads/1/3/1/4/131438641/494423.pdfIn PDF document text
    • http://files.misssummitinternational.com/uploads/1/3/1/3/131397996/f29a5.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/1/0432/1912/4382/files/dajukewawuwidegutap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/11654680882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6836/6760/files/toefl_ibt_reading_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/80978234511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3623/7206/files/jokiwawesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7768/7701/files/fijaguvezubujoruzalur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1066/files/90779268848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1607/4902/files/lifox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9802/1793/files/pompeii_buried_alive.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_off00006170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6170 5280 bytes
SHA-256: cc8b33dc2c0f9942940a54a4c5c9f1ef12f268cf036c5ad17a9393e36281fba2
font_01_sfnt_off00007375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7375 10136 bytes
SHA-256: 3e662b991379682326dd3ce798308e669e9dceaa7c830ab753f8e7900cff5e2d

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