Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cd48c57180ca58b…

MALICIOUS

PDF

44.2 KB Created: 2020-07-24 06:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bd3678f0c942896e8bc6b3ec5cc5280e SHA-1: e9fb541726ec273e235ad58af531825d5e9bbea9 SHA-256: 0cd48c57180ca58bb73b34cff9eddbac5297309898cf1deebce95657ffc24a49
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many of which are hosted on domains associated with SEO link farms and redirector infrastructure, specifically `ttraff.cc`. The document body, though heavily obfuscated, suggests a lure related to educational worksheets. The presence of multiple PDF links and a critical heuristic firing for malicious redirector links indicates a phishing or malware distribution attempt.

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=prime+factorization+worksheets+grade+6 In PDF document text
    • http://files.frontierguardians.com/uploads/1/3/2/6/132681294/nemimenarujol.pdfIn PDF document text
    • http://files.bromswoldbikefest.org/uploads/1/3/1/3/131381722/xefit.pdfIn PDF document text
    • http://files.ccscsings.org/uploads/1/3/2/7/132710676/5c8cc49.pdfIn PDF document text
    • http://files.keepanopenmind.net/uploads/1/3/0/8/130814642/354913.pdfIn PDF document text
    • http://files.yourfootheadquarters.com/uploads/1/3/1/3/131383738/fededevene_finivavub_ninak.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/1/0433/4895/1194/files/totoxanojipovixenirukegab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8076/0990/files/17855994582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8733/0464/files/81949357708.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/sesotepoxosuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8443/2031/files/xisoweraxogubipemom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/vokuzireni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3970/9589/files/tabakejub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4571/6129/files/wumufegafivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9430/1085/files/segurimisupulobunejunuj.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_off00006f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F49 5552 bytes
SHA-256: f5c6aa20024c5c41884001f20e40c7929cd0c77edf2adf831fb4b67f469aeffb
font_01_sfnt_off0000820a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x820A 9936 bytes
SHA-256: d5d97f4470683b2e7d950f43b3c9d562f280247f443461e7fcf0da754e5af56e

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