Malicious PDF — malware analysis report

Static analysis result for SHA-256 085c89f0522f79bc…

MALICIOUS

PDF

43.5 KB Created: 2020-08-22 12:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 031b4d7a26c499f46bb24e5fe2d8b6a8 SHA-1: 56eaaf57ea7fe9e5d4bd78a4f7de19287b6eb130 SHA-256: 085c89f0522f79bc2d7278444d2f1f71e88baaec1b9cbafcfd10197f0c512205
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though partially corrupted, contains text related to 'how to write abstracts in apa format' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated 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=how+to+write+abstracts+in+apa+format In PDF document text
    • http://veroxa.ernst-arch.com/uploads/1/3/0/7/130776132/b881083659.pdfIn PDF document text
    • http://files.dsconway.com/uploads/1/3/0/8/130873997/zusodonapija-bapiwu-jutebiremabekos.pdfIn PDF document text
    • http://files.tionalee.com/uploads/1/3/0/7/130738710/lazazefedurixela.pdfIn PDF document text
    • http://vadiri.dliqr.com/uploads/1/3/1/6/131606260/kazebedijepid-sirem-ruzakubazitoka.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/1/0433/0687/7080/files/8685957786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6489/2323/files/third_eye_chakra_meditation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/toxaretilirol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9961/7448/files/77106412126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/94260126358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/winepadedazesusekina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8587/9713/files/joverima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0721/2709/files/6608750570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/lufitok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8620/8406/files/xafugak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6193/6290/files/dodijuzeruzedowurelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4991/7347/files/78091906762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/form_14_missouri.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C22 5320 bytes
SHA-256: 35aec405e63da1b7ca8b17028ec94194d0dbb9a228cfea9e1b602cf309ae558b
font_01_sfnt_off00007e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2C 10120 bytes
SHA-256: 5e60851704a0f3c84d8f958576be6c1294e5236bbb29602b0e1f87e950d56963

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