Malicious PDF — malware analysis report

Static analysis result for SHA-256 019abc8a1668e45a…

MALICIOUS

PDF

54.6 KB Created: 2020-08-30 13:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2deef16464f608b9aba929f212caf127 SHA-1: 90ee5fc4ecd6a6782bd5ca7e558dad81b76dc169 SHA-256: 019abc8a1668e45af858d4acd5d57601788d9b6f515ce0ed9981b4a2acb8c6c3
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing indicating it redirects to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector found in the heuristics. The presence of numerous external PDF links suggests a link farm or SEO manipulation tactic to disguise the malicious intent. No scripts were extracted from this sample.

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/wix?keyword=adding+and+subtracting+like+fractions+word+problems+worksheets In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_e1883669ff4c45148f125acd4cf4194b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0c268c_9ea6696d556b4ac29976867bc244c0c6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/93c935_8877e91205444ad4b2f81934dcdef747.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_70e854ce6a3d4db89aedaaf136a267a3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6681/7689/files/22662717832.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2b09b_4d218ca78ef34cedafbe41f83d5898c3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4b7290_1c64d9f964db4346967afe8b8f42a879.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0779a3_be488050f51447d283ad391c5a83f1ac.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/913720_e20474f3ddeb4cdab34b54f58ce11e04.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8999/1582/files/dixieland_jazz_trumpet_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/wibofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3127/2351/files/20360368785.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

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_off000082a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82A3 5856 bytes
SHA-256: b1272eea0e192e2d9718ddb9cab08b5fa0df759498be1f94e7a3a123a14c7339
font_01_sfnt_off0000966d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x966D 9712 bytes
SHA-256: e59cef23b00893cdd9f5955d7cb355579ae29f1884742c6ae40daea9306ca170
font_02_sfnt_off0000b7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7EF 16116 bytes
SHA-256: 586fd2d47d7ef655ac8fcedaf3a17ac43b55ee34544d24df6525aba8b365c669

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