Malicious PDF — malware analysis report

Static analysis result for SHA-256 037a79c7873b37b3…

MALICIOUS

PDF

72.5 KB Created: 2020-08-05 04:48:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 645371a30c1e839ed078d41a6b33b1f6 SHA-1: e9585a34c1f4d0d051fa68d91eff3887290e3ca8 SHA-256: 037a79c7873b37b334f2dc18cd6130fe6866b9935be4d12262ab006ee44469d7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links designed to appear as a link farm for free downloadable books, but they redirect to a malicious URL. The primary redirector URL is identified as malicious, and the document body, though heavily obfuscated, contains a reference to this URL. The ML classifier also strongly indicated maliciousness.

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=edible+wild+plants+book+pdf In PDF document text
    • http://files.alohavolleyball.com/uploads/1/3/0/7/130740255/bapumujewab.pdfIn PDF document text
    • http://files.celestepedri.ca/uploads/1/3/1/4/131454733/xelajapela.pdfIn PDF document text
    • http://files.happyyouarehere.life/uploads/1/3/0/8/130874026/bemanigemi-botitafufititi.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/1/0431/6866/1670/files/mokorafonuwijutokoraxap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4143/1464/files/28673072690.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/33919648881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3641/6936/files/sememebovuwowowejariwan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4855/9004/files/12451692107.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/pumowugedirukon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6231/2611/files/nezonarekozepow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2433/3472/files/bosch_dishwasher_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/38715813306.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3582/0185/files/adeept_ultimate_starter_kit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/82107798105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70686619693.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_off0000df3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3B 5192 bytes
SHA-256: 78e35472b205fb2c00e4cfd58f07660d76f7905dfc2afe846ad0ddf8db261ba9
font_01_sfnt_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 10500 bytes
SHA-256: 5b952ecb18b6442f5736adc5bc1ec178853b45dacc1f561f50351e34bba31803

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