Malicious PDF — malware analysis report

Static analysis result for SHA-256 581531b21088897a…

MALICIOUS

PDF

55.3 KB Created: 2020-08-11 04:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5aea629ac41d4339ebb13ae724e1c2e7 SHA-1: a53b5a65d955c507e94f4de5939827184572460a SHA-256: 581531b21088897ac013a431213a61dbd672c8371bf709d985956568c0279429
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This URL is associated with a keyword search for 'inorganic chemistry miessler 5th edition solutions manual pdf', suggesting a lure to trick users into downloading potentially malicious content. The document body, though heavily obfuscated, also contains this URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs.

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/pify?keyword=inorganic+chemistry+miessler+5th+edition+solutions+manual+pdf In PDF document text
    • http://files.campladder.org/uploads/1/3/0/7/130740517/dabitiwaxadamupeso.pdfIn PDF document text
    • http://files.c21discoverycharityevent.com/uploads/1/3/1/3/131383650/e9fe11a47.pdfIn PDF document text
    • http://files.westventuramedicalclinic.org/uploads/1/3/0/7/130739557/3515727.pdfIn PDF document text
    • http://veziguk.heartwoodpath.com/uploads/1/3/0/8/130814297/zumekuvebefe.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/1/0432/9334/3902/files/90601110.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/the_college_writer_5th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1356/0731/files/lutedoboxarusosexek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8250/6647/files/15504198776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/64054504414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/tusajap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1752/7715/files/38653934341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7679/4021/files/85789141819.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/carpal_tunnel_syndrome_adalah.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/vozalorezanedar.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_off000096fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FD 5732 bytes
SHA-256: e5ffb2bce939652f874fc0be245ede809634fc9c54900ed30628951b1d36f37b
font_01_sfnt_off0000aa54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA54 11008 bytes
SHA-256: 32578b8ffa80793bdf98967e6e411be442d3762dcb3ba1002ef0b6d553b7b158

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