Malicious PDF — malware analysis report

Static analysis result for SHA-256 658230a74ae0a00a…

MALICIOUS

PDF

44.7 KB Created: 2020-08-31 11:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 75b348ba4d165754906a5220c245d54b SHA-1: 276eaa39e2f39a8ad17ce72d884aa0eab93305fc SHA-256: 658230a74ae0a00ad5ffe332b7ea89ddf0795b0cdf138937f9dfc704e63078b2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a free download, likely leading to a phishing or malware delivery site. The presence of a link farm and a redirector suggests an attempt to distribute malicious content or phish for credentials.

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/wix?keyword=comparative+biomechanics+vogel+pdf In 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/1/0432/4828/7912/files/dynex_tv_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/1733/9797/files/american_film_a_history_john_lewis_chapter_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43377474007.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/0243/7275/files/81349056875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/99087681343.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/63411202308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4556/0220/files/tixesedukezapovo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9800/3874/files/muful.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/eda9ba_143eefbea2434d688a6091152a39d4d2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b7ab08_1a09761b559c47d4a6e7e3b72f76f675.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 8

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_off00005b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B66 5676 bytes
SHA-256: 62abe22f31a1b386b939bc55b8059cc82c5e7ddbc766cb40796ab5296a22a4ca
font_01_sfnt_off00006e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E84 10148 bytes
SHA-256: aefa8549ee42f8cf4dc2abe0146540e91fe41d535109a7a02516c99f2cfd598e
font_02_sfnt_off00009125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9125 16148 bytes
SHA-256: 1a2b76eb92621148de57a48589384f2ed1ce1add53d2a8f9a0414c0ea737f4f8

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