Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe1bd59d47f3371…

MALICIOUS

PDF

55.1 KB Created: 2020-08-28 04:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 54c9e5ff833f3ba13b9fd1acacee45da SHA-1: ebd93ee613ae2bcb36c28f848c8c1ce7d998e6e5 SHA-256: cfe1bd59d47f3371ba3352a5774178bfd3891ff46195aa5b41b10815979a23bc
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=atreyu+%25C3%25A1lbum+a+maldi%25C3%25A7%25C3%25A3o', points to a known malicious redirector. The presence of numerous links, many pointing to potentially untrusted domains, strongly suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

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=atreyu+%25C3%25A1lbum+a+maldi%25C3%25A7%25C3%25A3o In PDF document text
    • http://baduvov.jacquelinecutler.com/uploads/1/3/0/8/130814229/76e426f43da.pdfIn PDF document text
    • http://vinipe.michiganskymedia.com/uploads/1/3/0/8/130874330/nibinitezesokakijopa.pdfIn PDF document text
    • http://files.investigatenyc.com/uploads/1/3/0/7/130739210/e0e88c1135.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/1/0432/5235/1144/files/73827028962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8828/files/74782391292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/7918/0964/files/comparing_fractions_and_decimals_worksheet_6th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1531/5349/files/zolexeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/jikonu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4374/7990/files/24424854025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/lolojosivekatuzasog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0557/4309/files/lotarav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4995/1125/files/wamifagojozafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9947/2550/files/ugly_electrical_reference_book.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 8

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_off0000880c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x880C 5536 bytes
SHA-256: 0b1311aa155beff55d4a27faa3d879a33efc25b1ffbfd84732e80ceeb4b16c0e
font_01_sfnt_off000099ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99AD 12712 bytes
SHA-256: a43d387b0da1281fbfddd4bb35863c818bc9d2f43a28f41aa571f252e4db189a
font_02_sfnt_off0000c00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC00D 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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