Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa10adc8abf3dc8…

MALICIOUS

PDF

52.5 KB Created: 2020-08-21 14:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4d05d69443f78c8c7bdbe9f57c5bd4c SHA-1: 3c4adf5402861c6547c3e348538fa966ddabe8fa SHA-256: caa10adc8abf3dc86cae551ea05c161118a55346ad74f8878d9ab11a1b202a2e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains text related to a 'medical fitness certificate format for job word' and a URL pointing to a redirector. This suggests the document is designed to trick users into clicking malicious links, likely leading to further malware download or phishing attempts.

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=medical+fitness+certificate+format+for+job+word In PDF document text
    • http://vojuzelug.enrichnaturals.com/uploads/1/3/1/6/131637284/dfb5fa0a3549a.pdfIn PDF document text
    • http://files.loploptravels.com/uploads/1/3/1/1/131163578/554e080ce29830.pdfIn PDF document text
    • http://files.matakanacommunitygroup.online/uploads/1/3/1/3/131384070/6366111.pdfIn PDF document text
    • http://files.henrycountycancerservices.com/uploads/1/3/1/4/131406714/45b0c5.pdfIn PDF document text
    • http://files.marketingmanusa.com/uploads/1/3/0/8/130813906/3971db1.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/1/0430/7409/3217/files/lesunisaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8189/9944/files/canada_passport_renewal_form_for_child.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/jutobujojesosumaziwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5965/7374/files/lefivolofa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4743/5940/files/tanobazuzuvaxoredovali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7558/2617/files/detukepokafutexaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/template_cv_format_word_gratis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4378/1792/files/best_free_reader_windows_10_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8080/0674/files/33521698258.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0249/8970/files/the_book_of_enoch.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2586/4603/files/chinese_english_visual_bilingual_dictionary.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000083c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83C4 2828 bytes
SHA-256: a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8
font_01_sfnt_off00008dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBE 5480 bytes
SHA-256: 7a25f988ee3acd227543f3208538b3d346fc129f44f7288a221c7b828231581b
font_02_sfnt_off0000a059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA059 9868 bytes
SHA-256: 198b903bd7b0cf24127d589f676fcab1a3aac9c5e9959c1cfd6871aca98ad395

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