Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c7bc5ea41c9c5d…

MALICIOUS

PDF

50.6 KB Created: 2020-08-12 15:34:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7547a663f562594df216a42f0216e80d SHA-1: a94e03c016671b25eb232d84ccdda16096a9ad48 SHA-256: c3c7bc5ea41c9c5d5ca7e52b3698ea79765b440ac25b186b406ab6bf6ad12171
194 Risk Score

Malware Insights

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

The PDF file was flagged for containing a large number of external links, a technique often used for SEO manipulation or to distribute malicious content. One of the primary links directs to a known malicious redirector infrastructure. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector suggest an attempt to lure users to harmful sites.

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.ru/pify?keyword=bacterial+pathogenesis+wilson+pdf In PDF document text
    • http://files.srrlsf.com/uploads/1/3/1/3/131380868/4f04903295aa5.pdfIn PDF document text
    • http://files.melissaholden.com/uploads/1/3/1/8/131856904/fegonegan.pdfIn PDF document text
    • http://files.epsaofficial.eu/uploads/1/3/0/7/130738548/850429.pdfIn PDF document text
    • http://dajavemu.makersnextgen.com/uploads/1/3/2/7/132710621/kebefenet-zorokudabiri.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/1/0436/2915/0368/files/wujibibamogelugelezadix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2010/8455/files/96972093377.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8851/9074/files/31008555602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5322/6913/files/bidal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1324/8923/files/damofumew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3956/3686/files/munipizovazof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0882/3193/files/bise_lahore_9th_gazette_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1324/2014/files/income_tax_amendments_for_fy_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78030006053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4816/3738/files/gepopurotepi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0263/4148/files/zurudumakamumipemo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3735/1323/files/vitupowabaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5091/7269/files/cuaderno_para_colorear_mandalas.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_off000086f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86F1 5556 bytes
SHA-256: 2edd45f9ed89d5f1a7b9db05fb55e4d40c7a62d1dd432f10f733b853f2da04d2
font_01_sfnt_off000099db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99DB 10544 bytes
SHA-256: a5d2f31002f8494500eec61f823ae46e80d5abb4ab373ef262f4bad4db50bf35

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