Malicious PDF — malware analysis report

Static analysis result for SHA-256 c82696376a1ffa5f…

MALICIOUS

PDF

44.3 KB Created: 2020-08-11 14:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a1e0001b2584a8cf2c7ca7583002d413 SHA-1: 7d335015edb01559000a2e75a26c40dadfb29340 SHA-256: c82696376a1ffa5f3f4afa6ccb89c360b7a280182adc3b3c166a9d4a0648ed78
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a 'sepsis guidelines pdf' and includes the malicious URL. This indicates a phishing attempt to redirect users to malicious content. The presence of many external links, including to Shopify domains, suggests a link farm or SEO poisoning tactic to increase visibility.

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=sepsis+guidelines+pdf In PDF document text
    • http://geralut.cornerstonecowboychurch.org/uploads/1/3/0/7/130775432/gatizoleluzelivedu.pdfIn PDF document text
    • http://tebitisep.slatingtonbaptist.org/uploads/1/3/1/8/131856158/lewamomuwima-xifemilesozul.pdfIn PDF document text
    • http://files.teflvn.com/uploads/1/3/1/3/131379846/7c0786b.pdfIn PDF document text
    • http://files.silvaweb.net/uploads/1/3/1/3/131380021/7795ffa7b2fd.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/1/0429/7896/7703/files/42459641169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1093/3414/files/sinunumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/xagasedewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5824/7320/files/basic_concepts_of_business_economics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/gigibejewusixuletupejin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5603/7016/files/5115111328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0212/6751/files/alpine_mrv-_m500.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6845/6088/files/fafekixum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3065/9751/files/encyclopedia_books_in_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/wirekizox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9137/8854/files/55349250584.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9693/2501/files/93117093950.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: silvaweb.net 3 samples

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_off00006d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9C 5008 bytes
SHA-256: c30a76b17f4635c06ca813841612546ef0c382ecf6af017f7b2715abd11df68d
font_01_sfnt_off00007eb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB9 11784 bytes
SHA-256: 53776233cf5c57bb9794054d751c09f2f3b7738d24d5fa8582e7ec1503839f0c

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