Malicious PDF — malware analysis report

Static analysis result for SHA-256 897ca681b8b0f436…

MALICIOUS

PDF

45.2 KB Created: 2020-08-21 08:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 67a5051c7be4e61a8669c35a019e1687 SHA-1: 03aacf2e333486e0c969f6388f0532a7a0bf06b0 SHA-256: 897ca681b8b0f436c4b0cbcbc9dddaf4cb918ab6e2d2129670da8bb38b3b924d
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link, 'https://ttraff.ru/pify?keyword=gutachten+jura+zeitform', is identified as a malicious redirector, likely leading to a phishing page or further malware. The document body, though heavily obfuscated, contains this URL and references to legal documents, indicating a lure to trick users into clicking malicious links.

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=gutachten+jura+zeitform In PDF document text
    • http://files.memorialvocalmusic.com/uploads/1/3/1/4/131453284/c15cbe0aa17.pdfIn PDF document text
    • http://vuxavofe.janesmitheditor.com/uploads/1/3/0/7/130738971/7910910.pdfIn PDF document text
    • http://files.arielcao.com/uploads/1/3/0/8/130814769/keniwalidebuv.pdfIn PDF document text
    • http://rumetor.interporcspain.org/uploads/1/3/0/9/130969060/05217a59e254b.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/1/0438/1392/9122/files/antrenmanlarla_geometri_10._snf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8000/8355/files/lobapemobolumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/67908986380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9014/0583/files/nuwivopakora.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1283/8808/files/jekoweki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/atomic_structure_of_first_20_elements_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3382/files/tukajexikemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2010/6404/files/nespresso_essenza_mini_solo_capsule_machine_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/73233016808.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/learn_kannada_in_30_days.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/3880670713.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7954/8574/files/heart_of_worship_chords_key_of_d.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7421/5331/files/91817781665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5830/files/calendario_menstrual_2018_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2483/4982/files/52402511769.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
🗂 Part of campaign: arielcao.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000736c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736C 5068 bytes
SHA-256: e23720932e456c779bb1f27d9a12649f22ea1800b47d7380ae98605cac54cdb2
font_01_sfnt_off0000848c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x848C 10804 bytes
SHA-256: 15e5b6f7e85c63d37184ae1be573d8b7a06aa522841d78b664648e5de7303293