Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b267d848cb05b2b…

MALICIOUS

PDF

37.6 KB Created: 2020-08-23 10:07:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4ec9880d8301ceafaa8a6f755f308df1 SHA-1: 8003cc0de6164d16a5b0bc32cb07d3ec22e41e00 SHA-256: 4b267d848cb05b2b160c696d63e79203d7e2c1f63a866c66679737fed4d8cd4f
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO link farms and phishing. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.cc/pify?keyword=anestesia+local+en+odontologia+libro+pdf', which is likely intended to lead the user to malicious content. The document body, though heavily obfuscated, contains text fragments and URLs that reinforce this lure. The presence of multiple Shopify links suggests an attempt to blend in with legitimate content while distributing the malicious payload.

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=anestesia+local+en+odontologia+libro+pdf In PDF document text
    • http://files.carinaripley.com/uploads/1/3/1/0/131070612/2966957.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/1/0435/9861/0591/files/crossfire_hurricane_lyrics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6815/2216/files/88692458182.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4061/3286/files/76651076431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6877/5841/files/kixemu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/1742/4283/files/bazovefopumufatitu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9405/5843/files/viwam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuxojusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/negonopefud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7562/3322/files/20963143359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46506788711.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 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_off0000532b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532B 5452 bytes
SHA-256: 53e2890c48ae7d999c9ddd87e5c4f9949c6f2d75ba0377af30e66db1b823e346
font_01_sfnt_off000065bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BC 10468 bytes
SHA-256: 3602794832cc735d54fbb7cadeb5d2c98f24100320a77a72c843a9c88f04637d

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