Malicious PDF — malware analysis report

Static analysis result for SHA-256 657fa93288ef3b64…

MALICIOUS

PDF

46.8 KB Created: 2020-08-15 00:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21699264376465945d8e4576230d57f5 SHA-1: f1c2991c672e6d988041bfde3d29db043cc65ff3 SHA-256: 657fa93288ef3b643d3f020225d5154f13ba6102bc9706f1c608aee34cba5f52
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract search engine traffic. This suggests a phishing or scam attempt, likely to lead users to malicious content or further compromise.

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/pify?keyword=bifilar+pendulum+experiment+pdf In PDF document text
    • http://files.elementsoflifeinstitute.com/uploads/1/3/1/6/131606331/914540.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7691/9194/files/visegowi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4931/2665/files/jetixaforekin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tinoled.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2604/6362/files/gimumufikepinepewoxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9801/3845/files/zizuzigalaxawimuwurofok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1664/0923/files/garevifupip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5335/9005/files/2059178165.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/nunziata_cemento_armato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/dental_biomaterials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1878/7736/files/cessna_210_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/spelling_numbers_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5405/6095/files/fairy_tail_episode_list.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 2

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_off00006b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B72 4900 bytes
SHA-256: 0a047b1a6cdd3203d1e05eec3344a3c5bdae239af1fe564def8da64c1148c2b4
font_01_sfnt_off00007bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF5 10796 bytes
SHA-256: d1d8c00c0bb6ad58ab67e3586e017aaa5d80c2466b5aaa3560c4e66084eccd5f
font_02_sfnt_off0000a0a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A7 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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