Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6982a8dd4f1feb5…

MALICIOUS

PDF

45.0 KB Created: 2020-08-14 14:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a55e7e997a4156be92634f89fd0c812 SHA-1: f491174414ac37267bf4cd477f276bbaf0cda610 SHA-256: a6982a8dd4f1feb587c812e035f6c82b5582c00b874fd909f373b68d20317592
194 Risk Score

Malware Insights

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

The PDF file contains a deceptive title suggesting an answer key for a virtual lab, which is a common social engineering tactic. It embeds numerous links, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=calorimetry+virtual+lab+worksheet+answer+key'. This redirector likely leads to a further malicious payload or phishing site. The file also contains a large number of links to Shopify-hosted PDFs, indicating a link farm for SEO manipulation or to obscure the malicious redirector.

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=calorimetry+virtual+lab+worksheet+answer+key In PDF document text
    • http://files.vvphotography.ca/uploads/1/3/1/4/131453615/c526b2c7938.pdfIn PDF document text
    • http://files.woodridgeswimclub.net/uploads/1/3/1/3/131383754/minagosawupazud.pdfIn PDF document text
    • http://files.team-revo.com/uploads/1/3/0/7/130739415/e64a050a82e77.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/kefaxalojowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/16170533508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/munirixisinukapud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8111/3506/files/coded_with_love.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/atlantic_codex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6120/5399/files/6698227386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0789/3919/files/21108184830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70913092576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/zuwelidirom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/3421/9420/files/bulk_modulus_of_elasticity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2950/3901/files/gegog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/salexoso.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 6

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_off0000642e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x642E 5288 bytes
SHA-256: 1dbdbc1a31b1d940ebe5332c92f762ba256349a01a05fd80ad6771fc0a429670
font_01_sfnt_off0000761d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761D 10136 bytes
SHA-256: e9a30bbd05a0d7e8af9fd8af69dd40c4e00503b0027f6f7582a705e5a9e8dedc
font_02_sfnt_off000098d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98D3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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