Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbd151cf7a731e4…

MALICIOUS

PDF

115.3 KB Created: 2020-08-11 21:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 43a52f1c44f0b0fa15c3a24dd00e5764 SHA-1: 3d34621c06065ec46e4e3651debf79296a9477c2 SHA-256: cdbd151cf7a731e4aef1cff02d176a5e7e43233f1e6e63521077ca8c06f071f8
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. The document body, though partially corrupted, suggests a lure related to educational strategies, likely to trick users into clicking the malicious link. The presence of a malicious redirector indicates an attempt to deliver further malicious content or conduct phishing.

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=estrategias+de+ense%25C3%25B1anza+aprendizaje+julio+pimienta+pdf In PDF document text
    • http://files.kokopelliconnects.com/uploads/1/3/2/6/132695571/f5f61019b.pdfIn PDF document text
    • http://files.madisoncworld.org/uploads/1/3/1/4/131437330/d16dec229e0.pdfIn PDF document text
    • http://files.samanthasprings.com/uploads/1/3/1/4/131438629/fojimividunu_baputato_vunozutakilem.pdfIn PDF document text
    • http://pewadiwow.thesenseofplace.com/uploads/1/3/2/7/132740328/f94868.pdfIn PDF document text
    • http://files.foodstartuphelp.com/uploads/1/3/2/7/132710743/tojelu.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/1/0430/5482/5621/files/peperawukufuguviwiva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wunize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/somidasekawobafedaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/15231937623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9506/4733/files/ditimifuxuxidowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7755/8681/files/jepugubaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0555/3303/files/ranovowigerudokam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zukukujumifuxutage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/bollinger_bands_trading_strategies_that_work.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6772/8279/files/xokavekixilive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/learn_bodo_language.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/poranurumolusaruzijenoro.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 4

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_off0001817c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1817C 5656 bytes
SHA-256: ab4a6d9b09c8d59250a1efe75d98c05a6aa171a6819cf0ae5d5f0bc0a5b66a40
font_01_sfnt_off00019471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19471 12544 bytes
SHA-256: 01ec683fc786f2f892d481f7b536ecded7e94cec32c4372f57fad1242a9cc36e

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