Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf42cb1f5e68d16…

MALICIOUS

PDF

43.8 KB Created: 2020-08-10 06:58:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc885abcb968f190999cb4f67b52fbbf SHA-1: 791b56ac6b491b26c849c65baaf1d16ab552d00c SHA-256: 6cf42cb1f5e68d16502d2676bddfd8cb9e7758eeb7d67d945b9cd4fc2a38c7b1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, including one pointing to a known malicious redirector infrastructure at 'https://ttraff.com/pify?keyword=class+10+acids+bases+and+salts+notes+pdf'. This suggests a phishing or scam attempt, where users are lured by the promise of educational notes into visiting a malicious site. 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.com/pify?keyword=class+10+acids+bases+and+salts+notes+pdf In PDF document text
    • http://files.alchemyairwerks.com/uploads/1/3/1/3/131378771/vosunazi-fakikavoxidi.pdfIn PDF document text
    • http://gavow.smoothtransformations.com.au/uploads/1/3/1/3/131383657/pubovifidokunavaguxo.pdfIn PDF document text
    • http://files.brentwoodbayvet.com/uploads/1/3/0/7/130775583/pezos.pdfIn PDF document text
    • http://files.cedarkeyoutfitters.com/uploads/1/3/2/7/132712116/muduxolivulamo-beneselakizote.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/1/0427/4287/4278/files/wimow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/34112225386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4124/3814/files/75300039797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5349/5958/files/5889990077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0964/5478/files/xujurefadabi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/6213020554.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/trueman_s_elementary_biology_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0377/1041/files/mupisajazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9769/4114/files/zomigowisurimed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6175/4518/files/puzurukaselizaxub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4356/1376/files/zanotomuvuvomofa.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 7

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_off00006e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5F 5292 bytes
SHA-256: c335ea91d117ccd29ba7f9ba4eef382a390d90e1e0a59c2c3a8a867dc4a458b9
font_01_sfnt_off00008068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8068 9916 bytes
SHA-256: 19bf17c6737309aa59e0058d9fb8e6653fab7d2d27615f9a40a98980190670bf

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