Malicious PDF — malware analysis report

Static analysis result for SHA-256 753bef676b21c268…

MALICIOUS

PDF

41.5 KB Created: 2020-08-06 13:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: caec61388cc2eb8bbd8a29a5f222d9af SHA-1: 59b9cf7b353ff48d0a1145464374e94258b7917e SHA-256: 753bef676b21c268fcd0e82750a39331d0ee51316ed07f9d2c0e6115785f1115
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body text and embedded links suggest a lure for downloading a book, which is a common tactic for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and link farm heuristics indicate malicious intent.

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=basic+english+translation+book+pdf In PDF document text
    • http://files.tristanvick.com/uploads/1/3/0/7/130740173/07a05b36187dc.pdfIn PDF document text
    • http://files.suttoneducationtrust.com/uploads/1/3/0/8/130874244/zebote.pdfIn PDF document text
    • http://files.gerrypalmer.ca/uploads/1/3/0/8/130873923/puzexodawi.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/1/0427/9812/1119/files/94244069490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/rikabezazubosanibabodip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4388/0093/files/dededoxonegugerug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/gogiruzopujorum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/gewukevakosodinotu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/wadupebolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8020/files/23865955117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/64904166480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3845/7501/files/bolulukoxokufuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2054/6211/files/85167464345.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/intermediate_accounting_15th_edition_solutions.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_off00006379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6379 5672 bytes
SHA-256: f613c4587f0d581db7b0b69f84e6ce40bfec0d82ca37dc4818751e041e6588e5
font_01_sfnt_off000076b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76B7 10072 bytes
SHA-256: 6fb5f3db145b903b5598ef7f7f1cf1e90c4dacb65f4ef1217540ea54d96d9ff3

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