Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab2b81c99221881…

MALICIOUS

PDF

67.0 KB Created: 2020-08-17 07:33:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 22805494b52c2aec8b08127d30d1dc78 SHA-1: 6695617d23e1b96f46b6a70ec3830ab193e248ab SHA-256: fab2b81c9922188142cb1d9ecffeb0c914dee1badd6d899af41f8c5aff58d621
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Cdc influenza treatment guidelines 2019' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=cdc+influenza+treatment+guidelines+2019 In PDF document text
    • http://files.thecornishmusselshack.co.uk/uploads/1/3/0/8/130813378/wawikizusafus_pufozu.pdfIn PDF document text
    • http://files.mylunarsign.com/uploads/1/3/1/8/131857482/6fcae3.pdfIn PDF document text
    • http://files.stbartswednesbury.com/uploads/1/3/1/3/131379329/sutujefozasid.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/1/0430/8631/5684/files/basic_excel_2020_formulas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2114/8061/files/30963187300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1384/8733/files/87324359727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4424/7451/files/52174595568.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3224/7457/files/52968105728.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2286/7880/files/41913747942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0206/1215/files/repakilidobipotorumajimoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6532/7262/files/th7_attack_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5698/0377/files/tegifake.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3831/9527/files/jifaxevituxunuzap.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_off0000c7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C9 5776 bytes
SHA-256: 400af2e6250290eae9d062fb11d99bedc70f39b112f50dd33e181af97c72124f
font_01_sfnt_off0000db5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB5D 10456 bytes
SHA-256: 928271d11ab82da7e00a7d31968c8de50ebc578cc30079753eebdbad90d3f8e7

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