Malicious PDF — malware analysis report

Static analysis result for SHA-256 140f443701417032…

MALICIOUS

PDF

37.4 KB Created: 2020-08-20 11:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 959acfacd98e43b42a18d6fd8321382f SHA-1: 5729e3e6a3ec90ffde3afb485873bb7df23d17e6 SHA-256: 140f44370141703263af0fd3ae3dd0ef027816447d9f4392e82ede619d8d8b57
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to appear as legitimate free downloads, but it redirects to a malicious URL. This technique is often used in phishing campaigns to trick users into visiting malicious sites or downloading malware. The ML classifier strongly indicates 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=aircraft+structural+technician+book+pdf In PDF document text
    • http://files.titansinvite.com/uploads/1/3/1/6/131607522/lomina_vutunifurep_rudorifopagu.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/1/0435/7577/1304/files/64179757689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7679/7081/files/62165353861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0204/3288/files/pawilevotarerivexiboraf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/bhagwan_ke_bhajan_kare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/61880486507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4380/5591/files/16950865599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1789/5068/files/marathi_inspirational_quotes_on_life_challenges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9263/1962/files/47236433206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4046/3255/files/appcoda_book_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8094/9659/files/64617287911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/84562855112.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5856/1175/files/47533320793.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 2

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_off00004686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4686 5320 bytes
SHA-256: 6897859d1f6804068391af69ecfb7391cbbee33be5931c089f54c2c0fca73856
font_01_sfnt_off00005874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5874 9988 bytes
SHA-256: b55146e9a72194c15736b7cf9b046892ae21c9304ae0e06bc31f1983990cd1d0
font_02_sfnt_off00007ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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