Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1f56e2eb3f958a4…

MALICIOUS

PDF

38.8 KB Created: 2020-08-28 09:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba9e83314c4b1f031f913c84d1ac11f3 SHA-1: 46454224cf5aa8477ad9ce87ba3530ce09dddb0b SHA-256: d1f56e2eb3f958a42b3c620d3a9bb70ad5a6cc69f1001b9751b1fd5ce22b362d
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a common tactic for SEO poisoning and phishing campaigns. One critical heuristic firing indicates a malicious redirector link to 'ttraff.club', which is likely the primary malicious destination. The document body, though partially corrupted, contains the title 'Las cuatro después de medianoche' and the same malicious URL, suggesting a lure to a malicious site disguised as a document. The presence of numerous benign Shopify links is likely an attempt to blend in and reduce suspicion.

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.club/pify?keyword=las+cuatro+despu%25C3%25A9s+de+medianoche In PDF document text
    • http://files.cambridgeballetclub.co.uk/uploads/1/3/1/6/131636995/e0fe1f65d.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/1/0433/6353/2951/files/34098656288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gabagijujusudizal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/numeros_de_tres_cifras_ejemplos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1361/7302/files/adobe_audition_1._5_setup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5312/0679/files/product_positioning_strategy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/kawakawa_bay_rock_climbing_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5294/8901/files/free_fillable_w-_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/wobakivejudebadolese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0453/4692/files/whatsapp_apk_for_iphone_5c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A79 5248 bytes
SHA-256: 716bcdb8e15884e8111a51d604ed978eefbca8cff4e9f166cf5e2a0f9f9c0e02
font_01_sfnt_off00005bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCE 10640 bytes
SHA-256: 941f3019d7f3338e4bf21d0d16a7881c1894bed1c8dfe3c9d58e6ba0af523424
font_02_sfnt_off00007e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8D 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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