Malicious PDF — malware analysis report

Static analysis result for SHA-256 02102dcf639aff4a…

MALICIOUS

PDF

50.9 KB Created: 2020-08-18 21:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5fa5a925465341bba1944cb6f62f96a0 SHA-1: 9dbf31481cb5c63e07d75b8abdedd84046621d17 SHA-256: 02102dcf639aff4a57d20668bd162e44cbf9b496e7f1bd0398357c238c3bb0aa
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 identifying a redirector to a known malicious URL. The document body, though heavily obfuscated, contains a reference to the malicious URL, suggesting an attempt to trick users into downloading a malicious file. The presence of numerous PDF links also indicates a link farm strategy, likely for SEO poisoning to increase visibility of the malicious lure.

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=catastrophism+theory+pdf In PDF document text
    • http://files.frankiegardiner.com/uploads/1/3/1/3/131384071/fekogopi.pdfIn PDF document text
    • http://xukajetup.nacefoodshelf.org/uploads/1/3/1/1/131164104/bunativetotomi_wofeputilar_guvonanadobefu.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/1/0428/2328/6940/files/walking_up_stairs_sound_effect_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/derek_hull_materiales_compuestos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8502/7745/files/how_to_open_steam_game_files.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/62727269138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6393/4105/files/rimworld_tame_thrumbo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/90358533970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8555/2030/files/16046064308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/tubamadaworijeluwajaxed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6577/0133/files/rafunelitapi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6195/9073/files/jolebaragavovelopifeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6416/3490/files/mh_cet_2020_result_download.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 4

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_off000079a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A3 5056 bytes
SHA-256: 3764859c6a49cdc7a8415c3b4f969789257475ba5f8742990fd09dac3405ac94
font_01_sfnt_off00008ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE2 11608 bytes
SHA-256: 774e42c23d589e63b0d3d57f66c4234d8bfd2618c1c5be5005d10258f3f16765
font_02_sfnt_off0000b0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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