Malicious PDF — malware analysis report

Static analysis result for SHA-256 158262d561a25c5f…

MALICIOUS

PDF

41.6 KB Created: 2020-08-18 16:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 61e2752174fdf2049b2d47e8f622b7ce SHA-1: 3daaf548fb25c415a2189983050294f4c943dac0 SHA-256: 158262d561a25c5f74f579048b2c5fcf51a9c97c619df38dc802616d0c109dee
194 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, many of which point to a redirector service. The primary redirector URL, 'https://ttraff.com/pify?keyword=informatics+practices+class+12+ncert+textbook+answers', is associated with malicious activity. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to a malicious site under the guise of providing educational content. The ML classifier strongly indicated maliciousness.

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.com/pify?keyword=informatics+practices+class+12+ncert+textbook+answers In PDF document text
    • http://files.dentacarekenosha.org/uploads/1/3/0/9/130969371/tezosamujusifirix.pdfIn PDF document text
    • http://files.libertystroops.org/uploads/1/3/0/8/130813364/3238981.pdfIn PDF document text
    • http://files.friendsofcountry.org/uploads/1/3/2/6/132695551/9228883.pdfIn PDF document text
    • http://files.emery-law.com/uploads/1/3/1/3/131381288/tisigimako.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/1/0440/3052/5590/files/31404389612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/bufurexejusojazama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/1289/1297/files/bajrang_dal_ke_wallpaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/6386/5497/files/ligularia_reniformis_auckland.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/91714782450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6745/7188/files/50015136174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/84129677506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1444/5465/files/bourbaki_thorie_des_ensembles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8575/6568/files/kuzakeroderevomefik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/wedding_day_timeline_template_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1201/2701/files/14818448723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5480/0797/files/vabinugogokasekelojomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1370/9722/files/93735637395.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_off0000632d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632D 5648 bytes
SHA-256: d6d9ad2a7d534374cd1ef4d13b5ba9678fbf529421d636005fa2a5c33d78ce4a
font_01_sfnt_off0000765d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x765D 10288 bytes
SHA-256: 6566fc5671910f70c94686c711f6654f08865c7371754ca23973ecf09bb528ab

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