Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7fd5db88e6094dd…

MALICIOUS

PDF

41.5 KB Created: 2020-08-28 09:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c78b938519a66dd72d516536ea3f962 SHA-1: 81ca602fa098a072af76826b204ab53ef78f3367 SHA-256: b7fd5db88e6094ddcce6c523f07c9b8c11bdb57a49562fb6021a384774ce0bdb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though partially corrupted, contains text referencing '3ds max 2020 book' and a URL pointing to a redirector. This suggests the document is designed to lure users to malicious infrastructure under the guise of providing a resource. The ML classifier strongly supports the malicious nature of this PDF.

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=3ds+max+2020+book In PDF document text
    • http://gopunuwiv.naramatachildcare.com/uploads/1/3/2/8/132814930/6174374.pdfIn PDF document text
    • http://kawawo.northwestbiscotti.com/uploads/1/3/0/7/130739564/139990.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/1/0434/0819/5738/files/6584559425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9289/2053/files/jokapopamobezoritoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/30194025787.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4018/1146/files/structural_reliability_analysis_and_prediction_melchers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2503/9266/files/free_english_worksheets_for_grade_3_grammar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3832/6432/files/lightroom_2017_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4359/3109/files/simile_metaphor_personification_worksheet_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5303/files/29735774425.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/dragonballz_flash_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/3960/9252/files/estructura_de_los_materiales_ceramicos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2924/9694/files/translate_from_spanish_to_english_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4967/2091/files/causes_of_poverty_in_the_philippines.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 1

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6372 5456 bytes
SHA-256: a1c73c38b15681956bc8855cf55cd6283b6920edb03c2b9e80cabe75f2464f30
font_01_sfnt_off000075ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75EF 10332 bytes
SHA-256: 08ec686de6e76aa3da13478b1715215b7119e11a461c10f7ea55a1662bfb48e7

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