Malicious PDF — malware analysis report

Static analysis result for SHA-256 f97a01c804aa99ce…

MALICIOUS

PDF

43.1 KB Created: 2020-08-11 14:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a23fb967b035d07df2c3e3472cd0a2c7 SHA-1: 1695fec36a5b913d6f14a5bb9dfab122ea8c68b5 SHA-256: f97a01c804aa99ce18f5d226d98febdfb1514fea8fc0ea3c3cbf50bb8040565c
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, specifically pointing to 'https://ttraff.cc/pify?keyword=calculus+books+pdf+free'. This indicates the document's primary purpose is to redirect users to malicious infrastructure under the guise of providing a free calculus book. Additional heuristics confirm the presence of a link farm and general maliciousness. The document body, though heavily obfuscated, also contains the same redirector URL and other suspicious URLs.

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=calculus+books+pdf+free In PDF document text
    • http://kivot.bensonbunnies1971.com/uploads/1/3/1/4/131453109/8437979.pdfIn PDF document text
    • http://files.timothymperez.com/uploads/1/3/2/6/132681985/kovafasufuvapedizar.pdfIn PDF document text
    • http://files.givehim5.net/uploads/1/3/0/7/130739951/jejodenogego_tugasa_nozegevadatuba_sepov.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/1/0437/0097/7816/files/70914876807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/sowuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/legivitaruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6730/9206/files/44420829170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4940/2016/files/widixexedonose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6117/4687/files/34778673445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/68296725111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8882/8829/files/heroku_rename_app.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6178/6262/files/engineering_abbreviations_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8747/0499/files/epfo_registration_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1981/1490/files/anesthesiology_img_friendly_residency_programs_list.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
🗂 Part of campaign: bitsnpieces.ca 5 samples

Related samples 1

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_off00006300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6300 5256 bytes
SHA-256: 9240b6e0bc7def2521cabbf83d0bf3a33634cfd9e94df7d56981d5e50242ef32
font_01_sfnt_off000074e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E3 13704 bytes
SHA-256: 52e0c849ea1f2bbe9b3116d133545fd15cc5f0ff68307b5b7b53f5f69cd24391

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