Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad0bb8213ff0f43…

MALICIOUS

PDF

45.9 KB Created: 2020-08-14 10:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d4bf019a53ca48bd13617a43bc181fea SHA-1: ab125d6500d39541e374d0c1076e396c8435f755 SHA-256: 1ad0bb8213ff0f433f411543ff27e73908e1b23c26f302f0711c3b2d6ffed739
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate study guides, but the primary link redirects to a known malicious infrastructure. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that leads to the malicious redirector, suggesting a lure to a phishing or malware distribution site.

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/wb?keyword=sat%20math%20study%20guide%20pdf In PDF document text
    • http://files.healthblc.com/uploads/1/3/0/7/130776058/levokitulovenu.pdfIn PDF document text
    • http://zazomofa.corpuschristievansville.org/uploads/1/3/1/3/131383329/48b9e1fcb3f.pdfIn PDF document text
    • http://wuradidad.naturesspiritflytying.net/uploads/1/3/0/8/130813848/32ca361.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/1/0428/9839/1196/files/bootstrap_4_tutorial_franais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5086/9671/files/sap_fico_accounts_receivable_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7927/9527/files/pogakamegiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5490/8071/files/the_authoritarian_personality_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4181/5718/files/blackberry_picking_poem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3608/0288/files/podigexilab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9050/8960/files/zobolomu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/metifazenazomokaximix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/mechanical_engineering_interview_questions_and_answers_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5529/8213/files/ludusoku.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 1

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_off00006019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 7164 bytes
SHA-256: a17ef16f6477804173182afbeccd366d1fd7169817922bca78670ecf58c56942
font_01_sfnt_off000077bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BB 5532 bytes
SHA-256: 7d3398e0b1d4fa8b74d25ee305acfaaa4042c26bf115d58c4c3829afefc3f781
font_02_sfnt_off00008a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A71 9432 bytes
SHA-256: 7ca3249ac77e90ef73cf58a4eaaa3845de8eeb465150bea9335b6fc0b6603e64

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