Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b1b2e505ffa1d0d…

MALICIOUS

PDF

46.3 KB Created: 2020-07-29 00:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 197b07f2ce30711685f4166d7cca3a01 SHA-1: 7cbe8d77ef0b649b09ce72d319f6455a4864f6bc SHA-256: 4b1b2e505ffa1d0dab7378ac8b1d9005ad1818344cc87e4192928b4aee42e247
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link to ttraff.ru. Another critical heuristic indicates a PDF link farm hosted on Shopify, with 26 generated SEO PDF links. The ML classifier also strongly flagged this PDF as malicious. The document body is heavily obfuscated and does not provide clear textual lures.

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.ru/pify?keyword=samsung+marketing+strategy+pdf In PDF document text
    • http://files.carsfordummies.org/uploads/1/3/0/9/130969446/7081717.pdfIn PDF document text
    • http://files.boomboombrazil.com/uploads/1/3/0/8/130814057/rorevabolov.pdfIn PDF document text
    • http://files.tuslawmustangsfootball.com/uploads/1/3/0/7/130775014/c7d03f0a2d.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/1/0433/1952/5534/files/savuturavag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6306/files/fugasabowifuwiwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74140302582.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/ramisorabagotawex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1247/9382/files/38002087135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5163/9196/files/xatovaxujakunezirova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/79151530501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/juweros.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/84874126569.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/70935481798.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_off00007572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7572 5372 bytes
SHA-256: 353d329be35e25213e1d744df435036f170d8fdc274968a553ac41b669bbf8a0
font_01_sfnt_off000087a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A0 10868 bytes
SHA-256: f144f29ed1d3b7d91cede8c39d7f4b8d34de03aaaab57451e423441e1ef8e502

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