Malicious PDF — malware analysis report

Static analysis result for SHA-256 8302e555ca3f9a56…

MALICIOUS

PDF

39.5 KB Created: 2020-08-12 12:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a66e466714c720b90200a9556df72dc3 SHA-1: 7879bd58dde885233c08e7bcf91da5d2f49d216b SHA-256: 8302e555ca3f9a5653acf4645e02134ab2b1ef54c6dea84bae1d7faa368b7b34
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links designed to appear as free downloads, but they redirect to a malicious domain. The primary redirector URL is https://ttraff.ru/pify?keyword=mario+benedetti+cuentos+pdf, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a link farm or SEO poisoning tactic to lure victims. The ML classifier strongly supports the malicious verdict.

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=mario+benedetti+cuentos+pdf In PDF document text
    • http://files.mopswestchester.com/uploads/1/3/1/3/131379650/7722789.pdfIn PDF document text
    • http://files.buffalogroundhogday.com/uploads/1/3/1/4/131407315/zikuwazefeg.pdfIn PDF document text
    • http://files.zaratelabs.com/uploads/1/3/1/6/131636941/votow_niwuf_wevofonugan.pdfIn PDF document text
    • http://files.elsalvadortonawanda.com/uploads/1/3/0/7/130776611/5810954.pdfIn PDF document text
    • http://lojagik.thenewgrassroots.com/uploads/1/3/1/4/131482975/vojita.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/1/0431/6073/1808/files/writing_numbers_in_words_worksheets_grade_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0363/9970/files/baofeng_888_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2390/8520/files/sibefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/kideruxopenimuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/zetafafegatelosizag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/nekadikusofegopidigojiwiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7826/3718/files/kevoreronigi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8475/9711/files/gukize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6156/5850/files/93406531929.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7751/0055/files/jurnal_akuntansi_perpajakan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7985/files/valudoxudasizajib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0314/0506/files/52386369949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1327/5811/files/92237074998.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 5

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_off00005da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA1 5264 bytes
SHA-256: ee57473341592db18ba2bd28d50616a2a81f77aff7846273d65c3d5228946e12
font_01_sfnt_off00006f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F91 9852 bytes
SHA-256: 85ab498bef5e453c2926b7419285f3fc532fee060946a85eaad2a2ff050d67aa

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