Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5bc929013d78cb…

MALICIOUS

PDF

43.1 KB Created: 2020-08-14 13:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e7dbc84716167a3735ae197fa38e5f00 SHA-1: 4c752abc93bf5e00cc224bdf1fcbf1277e9c3eec SHA-256: fd5bc929013d78cb4d9941bb8b014bbe33fdaad99696c3b8df82593cf90605ae
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary malicious URL is https://ttraff.cc/wb?keyword=shastar%20naam%20mala%20pdf%20download, which is likely part of a link farm designed to improve search engine ranking for malicious content. The document body, though heavily obfuscated, contains references to PDF downloads and the malicious URL, reinforcing the lure. No scripts were extracted, but the presence of a malicious redirector and link farm strongly suggests 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/wb?keyword=shastar%20naam%20mala%20pdf%20download In PDF document text
    • http://jarilolef.nossg.org/uploads/1/3/1/1/131163599/8734486.pdfIn PDF document text
    • http://files.pop-wuj.org/uploads/1/3/1/4/131453251/jakedojonafawi-xujabu-samozud.pdfIn PDF document text
    • http://files.taeyongpark.com/uploads/1/3/0/9/130969012/biwonedutitutilomize.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3789128943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9890/6528/files/balancing_redox_reactions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5406/9910/files/fractals_in_molecular_biophysics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5713/3221/files/ansel_adams_born_free_and_equal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0083/9842/files/41838304410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0980/8280/files/37483218604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/99529223578.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1583/9645/files/dagikodibadavatosoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5795/5494/files/96993289248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4042/3587/files/bigoluratomipodilinov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4327/4402/files/88927969880.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 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DD9 5476 bytes
SHA-256: 3cd15a7fe998e018a166f754983f438911a8147eeac9cb2483d84c5b3567619b
font_01_sfnt_off00006053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6053 4132 bytes
SHA-256: 20bec287f534deb3861c20c542ae8a304dbafe6ebd31f84b0a6518a50b94c1b5
font_02_sfnt_off00006fee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FEE 14652 bytes
SHA-256: b94280c7607a792a9e434c78a21733999f11011ad7501a26e84a08a4be28c714

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