Malicious PDF — malware analysis report

Static analysis result for SHA-256 87b3953bf3b38359…

MALICIOUS

PDF

45.9 KB Created: 2020-08-03 14:55:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 923f16dbf22efbad9a2ef35096e9af2d SHA-1: 7ebd8573ce3dd55350829ad24a17a8e5c0e5b8dd SHA-256: 87b3953bf3b3835953c1074b61d63667ef08822db29132cbb2cac295247dfec4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service. The primary lure appears to be a 'Cinderella solution quick start pdf', which redirects to a malicious URL. The presence of a link farm and a redirector suggests an attempt to distribute malicious content or phishing pages.

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=cinderella+solution+quick+start+pdf In PDF document text
    • http://files.bendacappellafestival.com/uploads/1/3/0/8/130873758/tamejidikemawun.pdfIn PDF document text
    • http://files.mrsnow.org/uploads/1/3/1/4/131453902/kafasefejigufe.pdfIn PDF document text
    • http://files.soulfulnesstherapies.co.uk/uploads/1/3/0/9/130969710/26724845cf.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/1/0429/3374/7878/files/title_keys_ds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9672/7961/files/linksys_2000_firmware.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1423/4016/files/nujawuwolonebusudepawuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3470/6069/files/boriwon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/muzzle_energy_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/25436341945.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8058/1274/files/70657663470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/zotufipiludezatebuvibopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/55588489225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/furepofagozipagigapuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8114/5243/files/vukipax.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 8

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_off0000754a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754A 5244 bytes
SHA-256: 3346e147d65e714b3f5af7fe0f10302a4d5c814505506cf5a333e4808c34ce73
font_01_sfnt_off00008729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8729 10588 bytes
SHA-256: 81cded8f587d585ef9506731b6614f18e5a30ec28db296235b9b0d0bf65be6d7

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