Malicious PDF — malware analysis report

Static analysis result for SHA-256 859d3f4c30094b8e…

MALICIOUS

PDF

41.2 KB Created: 2020-08-21 03:00:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b1fe6d61385e247878cfae1ae66d369 SHA-1: cbe5a022cd07e69e0f3c1d74ae30566011dbb536 SHA-256: 859d3f4c30094b8ea4c3fe991636ddd06c3b2c1c1d83a134190f4b510fcd52ea
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a redirector URL, indicating a phishing or malware distribution attempt. The embedded content, though obfuscated, includes the malicious redirector URL and numerous benign-looking PDF links, likely to mask the malicious activity. The ML classifier strongly supports the malicious verdict.

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=jan+cartoon+title+song++mp4 In PDF document text
    • http://files.weatherstonechestersprings.com/uploads/1/3/1/3/131378950/0e3fb068a5.pdfIn PDF document text
    • http://files.amydethick.com.au/uploads/1/3/1/4/131454482/ecf4b6.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/1/0428/3708/2271/files/form_ssa-_454-_bk_04-_2014.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3078/8758/files/65536840915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/tamil_nadu_2020_election_results.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/16274957542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/as_cronicas_de_spiderwick_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1924/5467/files/wow_classic_rogue_lockpicking_guide_horde.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/colloquial_arabic_egypt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5607/4645/files/89498259644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3864/5151/files/atwood_rv_water_heater_parts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3794/8061/files/sign_language_alphabet_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6237/0210/files/linked_list_operations_in_c.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_off00004ef6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF6 5328 bytes
SHA-256: 086bf18f047656508364c5b0e9b39bda8f3d84ff54a2d4b054bc3d95d8da983d
font_01_sfnt_off00006103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6103 9864 bytes
SHA-256: e4b6ed641a6433de7418b052c57b7515cc95d009944861d4a538160b88314c4f
font_02_sfnt_off00008316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8316 16064 bytes
SHA-256: e456b5595f6e624407e10960d432782794320480929f7deed69280b081edb597

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