Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc0a765a28973fbf…

MALICIOUS

PDF

69.6 KB Created: 2020-08-20 19:49:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 890abf2cd398d20973a12cd73647156b SHA-1: 67a6ffd50ef8f367c7effb3371acd100daa5cba5 SHA-256: fc0a765a28973fbf349472062b2a080cbee73093f1bed44b78bcc0e614ea720c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, with many pointing to a redirector service. This suggests a phishing or social engineering attack where the ultimate goal is to lure the user to a malicious site. The presence of a link farm heuristic further supports this, indicating an attempt to distribute malicious content through numerous URLs. The document body itself is heavily obfuscated and contains the primary redirector URL.

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=terraform+depends_on+module+output In PDF document text
    • http://kegil.danielaolszewska.com/uploads/1/3/0/7/130740178/52b2b171d.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/1/0431/3638/5181/files/ninebezovok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7107/7526/files/boat_building_plans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9853/0202/files/dudut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4431/5029/files/kambi_kathakal_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1040/4000/files/calligraphy_exercises_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6802/3194/files/79651600454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0469/0581/files/oxford_discover_3_writing_and_spelling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/biotecnika_times.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5567/6580/files/the_academic_phrasebank_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5934/6582/files/amplitude_modulation_and_demodulation_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/9390/5828/files/embriologia_de_la_piel_y_anexos.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 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB27C 5000 bytes
SHA-256: 814780fd4b3e365ed1699b73ca41ca7f95aecf51fc97673813f9f51f2f720f50
font_01_sfnt_off0000c368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC368 2744 bytes
SHA-256: 99ca08574c0f61703d69c95e98248c5d024aef0632fe13605c1c1e389329cf25
font_02_sfnt_off0000cf12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF12 13596 bytes
SHA-256: e894a2105f8d6810556c27502a1509bdba4a8edd8c0458f2a456a39f401e4e63
font_03_sfnt_off0000fad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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