Malicious PDF — malware analysis report

Static analysis result for SHA-256 52f8877f5c8e407f…

MALICIOUS

PDF

46.5 KB Created: 2020-08-15 16:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2cd0756f6dc10a519fe295c2f4bee83b SHA-1: fdc57443bd52fa795eb97e23e98df3c30485effd SHA-256: 52f8877f5c8e407f1e22e93d0f921c43f8751107bb21e2b3bc7e110308abb44e
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=kring+et+al+abnormal+psychology+pdf'. This URL is likely used to redirect the user to a malicious site. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. 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.cc/pify?keyword=kring+et+al+abnormal+psychology+pdf In PDF document text
    • http://files.mastertradesmen.co.uk/uploads/1/3/1/3/131380849/wonugipakofemetafeva.pdfIn PDF document text
    • http://tigigidap.charlotteshelix.net/uploads/1/3/1/4/131453541/99cf7e15.pdfIn PDF document text
    • http://files.equestrianpa.com/uploads/1/3/0/7/130775876/6971981.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/1/0427/8000/0423/files/9495547462.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8091/7926/files/narijoten.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2762/0263/files/wutezulew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2084/5210/files/hallelujah_ptx_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9548/8680/files/x_air_xr18_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/sovimopatugada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/bacteriologia_veterinaria.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7913/0531/files/42410572796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1342/0702/files/82943432318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/maviredezogenowasepivona.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 5

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_off00006531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 4600 bytes
SHA-256: 3a67f358ebe73fec7a23d2257bde487571e801f9ba18b113d2b6bf806f2d6940
font_01_sfnt_off0000752d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x752D 5780 bytes
SHA-256: 17f6699e032cfc18f33b7c43dd7090db5f2c2856888da6fa8ed8686a2c3f41ef
font_02_sfnt_off000088a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A5 9964 bytes
SHA-256: c17e97bf05131bb0fc7446c7e0c081e923f4e91d2f451f5128e3af7215e0298f

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