Malicious PDF — malware analysis report

Static analysis result for SHA-256 db87dc4d1a969549…

MALICIOUS

PDF

40.5 KB Created: 2020-08-18 17:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7bbfb6d3c567c87e330d0d7f9862e96d SHA-1: 37a9e534a2881d83f7e247796e58b0d57b30203d SHA-256: db87dc4d1a969549da9871d1fecc3cbcd5896f41e4f0b9771545a3d713dcbd4a
194 Risk Score

Malware Insights

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

The PDF file contains a "kerning game answers" lure in its document body, which is a common tactic for social engineering. It embeds numerous links, with a critical heuristic identifying a link to a known malicious redirector at `https://ttraff.cc/pify?keyword=kerning+game+answers`. This redirector likely leads to a malicious payload or phishing page. The presence of a link farm heuristic further indicates an attempt to distribute malicious content or manipulate search engine results.

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=kerning+game+answers In PDF document text
    • http://files.southingtonjaycees.com/uploads/1/3/2/6/132695732/6cb116fcb.pdfIn PDF document text
    • http://files.kkconstdesign.com/uploads/1/3/1/3/131379591/dutizirawuroboku.pdfIn PDF document text
    • http://files.mrscormiersmathclass.com/uploads/1/3/1/6/131607075/bukuvizaj.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/1/0432/2285/9943/files/94724960653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/blood_test_normal_range.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/tosadegiwotetosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9189/4176/files/vumozito.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7170/9092/files/83767559999.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8202/3073/files/schizophrenia_nursing_diagnosis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7883/4586/files/inorganic_chemistry_housecroft_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4213/6476/files/functional_group_interconversion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/2418/1416/files/itunes_free_apple_za.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9172/9309/files/betadine_24_mg_bula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2553/8973/files/98147301405.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6123/8168/files/46424160778.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 4

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_off0000619e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x619E 5036 bytes
SHA-256: afaa8fc990cb0f739c121cdf96730c711e409b9d05341ca74a31118ff00f48af
font_01_sfnt_off000072bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72BF 10108 bytes
SHA-256: e4d3eaee273ba17a7e625a7e6610b10efd55725601e87b4ddd913d64a390c9fc

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