Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd4bf1077ffb9519…

MALICIOUS

PDF

36.9 KB Created: 2020-08-15 04:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 16dae717eee90fe0e7d31a39462013af SHA-1: 32c3d2cf414b3129f81a151258dcf1d8272d95a1 SHA-256: cd4bf1077ffb95190318b4fd87a8d4f0c266e49f3a62d3bdd2c48fc1e99a88ac
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains multiple external links. One critical heuristic identified a link to known malicious redirector infrastructure (ttraff.cc), while another noted a large PDF link farm. The document body, though partially corrupted, contains the URL https://ttraff.cc/pify?keyword=rounding+and+estimating+worksheets+5th+grade, suggesting a lure to educational content that redirects to malicious sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

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=rounding+and+estimating+worksheets+5th+grade In PDF document text
    • http://files.kcsaussies.com/uploads/1/3/1/6/131606035/4790224.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/1/0431/3382/9277/files/15126888142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8255/5297/files/mavaxusefeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/fubimufifitawaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6382/8895/files/datobowenubasapozanadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5928/0022/files/john_mcmurry_organic_chemistry_9th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/sigirumifodijikedogut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/45528996117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/tigepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3631/0693/files/no_ceilings_lil_wayne.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1190/7488/files/does_walmart_check_serial_numbers_on_returns.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0273/9363/files/rozosukazakepa.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_off000053a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A7 5496 bytes
SHA-256: f96e102f308c681f05d39ecf455c7bcbc45ae5c961c69e157c834bc85c957b20
font_01_sfnt_off00006645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 9532 bytes
SHA-256: a49413d651f3b2180a806dc8979350d1e4cd34a326d99dc87c3f05cf756923fe

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