Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b98b61e4ef495fd…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 04:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f464dd2dd1e26c79bf1658e15570c69b SHA-1: 4059703142282ed9b1017b519045b62916169c26 SHA-256: 8b98b61e4ef495fd30796bd725e54ae78c6a6f6e99e696f72f0f9055ca02274f
194 Risk Score

Malware Insights

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

The PDF contains a "job alert app free" lure within its document body, directing users to a malicious redirector URL. This redirector is likely part of a phishing campaign designed to compromise users. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports malicious intent.

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.cc/pify?keyword=job+alert+app+free In PDF document text
    • http://soleteb.unitychristian.com/uploads/1/3/0/7/130738970/vexog_nenivawegiwit.pdfIn PDF document text
    • http://files.stilettosinthemud.com/uploads/1/3/1/8/131872021/nukixeto.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/1/0430/7353/6161/files/65164736590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8598/6982/files/classical_gas_sheet_music_guitar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5395/6758/files/45586129527.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6360/6429/files/advanced_apex_programming_for_salesforce._com_and_force._com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5166/3012/files/vodar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7811/4727/files/dobub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/2423/9003/files/alkaloids_in_food.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4168/5665/files/56257688308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/pijuwem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/kekiraseku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7011/9333/files/bekutaxevexozerokubedesis.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 3

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_off0000660d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x660D 4848 bytes
SHA-256: 3eb11c99b36d241c657792ab43f2fad9992b35370d7e1e03c4663f82b1660fed
font_01_sfnt_off0000769a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x769A 10688 bytes
SHA-256: 8e75c4e369ebbd76416300d3b999731d76478603f5b7fd8d0aa247e8f981c21d

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