Malicious PDF — malware analysis report

Static analysis result for SHA-256 662ff6d6cd97da1a…

MALICIOUS

PDF

46.8 KB Created: 2020-08-09 03:57:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c46f7b98328325cc59c83f29467345d6 SHA-1: a1d1fe60bbe6408d96fc198e5b5a89335c2289ac SHA-256: 662ff6d6cd97da1a1fbab09b37c69dbf847e08fe64b3d7f7b5a1deecea75a576
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service known to host malicious content. The document's structure and link farm indicate an attempt to lure users into clicking malicious URLs, likely for phishing or malware distribution. The ML classifier strongly supports the malicious nature of this PDF.

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=malformaciones+congenitas+del+recien+nacido+pdf In PDF document text
    • http://files.coachdavidhenley.com/uploads/1/3/2/3/132303150/7319031.pdfIn PDF document text
    • http://files.ouwpc.org/uploads/1/3/0/7/130738593/fafesuwil.pdfIn PDF document text
    • http://files.myindietrail.com/uploads/1/3/1/3/131398125/5756474.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/1/0430/9313/1425/files/71833422794.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/8301/7895/files/15207334300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8145/8069/files/bapatiretob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1353/6925/files/20083816442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3278/0695/files/calendario_2020_con_semanas_numeradas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5060/5461/files/59827271058.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/awards_and_honors_gk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6193/6285/files/saxileforiruradisigito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6976/3747/files/profit_and_loss_appropriation_account_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1795/3702/files/funuwumubozanogukaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/jovoforenatukebukoxuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9560/files/dolores_cacuango.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1912/4382/files/90522179045.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 7

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_off0000749d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x749D 5480 bytes
SHA-256: 43be831804b216a56ad1da16985eb53425b1c9d4df115d3fcced070a3c271c08
font_01_sfnt_off0000873a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x873A 11452 bytes
SHA-256: 929875ea3d11f34cdec3a1c158db5fe81285b54e130b1e47aea190566fbaed45

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