Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4e7601ab0dd6aa…

MALICIOUS

PDF

48.7 KB Created: 2020-08-07 04:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d8ab2fbee015e9d8a3e11f725cc7cb0 SHA-1: d72fbe1311b7d190564b6d9599c8219e3f6b3579 SHA-256: ef4e7601ab0dd6aa11b6134ffd4872560b9b42a8816117ace8417e989fc46e0a
202 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating an attempt to lure users to malicious content. The document body, though heavily obfuscated, contains text related to 'school building plan' and the malicious URL, suggesting a social engineering pretext. The presence of a visual download button further supports this lure. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=school%20building%20plan%20section%20elevation%20pdf In PDF document text
    • http://gizijisig.christianjessup.com/uploads/1/3/0/7/130738666/vopepuratijoxuz.pdfIn PDF document text
    • http://files.julietteyoga.org/uploads/1/3/2/6/132681316/7414463.pdfIn PDF document text
    • http://files.funktionalglassworks.com/uploads/1/3/1/4/131406295/31c9ef.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/1/0437/2656/9633/files/52832217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4111/1716/files/negukaninodajenigak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/sokojurukagobesozedilorof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0012/6885/files/vilufupuleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/xozofaked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1272/6677/files/tigugagatewatetike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/pantone_formula_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0017/4504/files/udp_tracker_istole_it_80_announce.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7337/9231/files/workout_plans_to_lose_weight.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2537/5127/files/29720933625.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 4

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_off000072d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72D9 5508 bytes
SHA-256: c8bf0f38f7c10cdec463e83055461c366e5e03438cab1d092db5ecb7c5f06fc7
font_01_sfnt_off00008587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8587 10064 bytes
SHA-256: 59c446b9b084b453b9c30504b445a34da461609e0c53a4b93ffcfb5cf7bd2524
font_02_sfnt_off0000a7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F3 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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