Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d843ecd14401f51…

MALICIOUS

PDF

40.8 KB Created: 2020-08-10 17:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fe261a655c03df0887769593441f9432 SHA-1: 38ad4a049bca78aa054003c0e632b30738b6b5e1 SHA-256: 4d843ecd14401f5118047b6c5e65d5cc4ecec94a9f7a3b3360bf4e60a99a22f5
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.com/pify?keyword=texto+argumentativo+concepto+pdf'. Another heuristic identifies this as a PDF link farm, suggesting a coordinated effort to distribute malicious content. The document body itself is heavily obfuscated but contains the same lure text as the redirector URL.

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.com/pify?keyword=texto+argumentativo+concepto+pdf In PDF document text
    • http://files.kskydonner.com/uploads/1/3/2/7/132741352/2e477e.pdfIn PDF document text
    • http://files.twistedpantry.com/uploads/1/3/1/3/131381112/xilixirezej_kusilitutufadi_pabereregi_pomitexuzu.pdfIn PDF document text
    • http://files.theovercoming.org/uploads/1/3/1/4/131438353/suwibirigefibef.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/1/0433/8683/0998/files/felibavixupakewokin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9761/0657/files/sifezilibobonenon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lajuvifubukakevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7968/7587/files/hinario_aleluia_cifrado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2351/5300/files/domapagarutafenilofaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/siwojiwabomilojilupori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8937/9993/files/ranavop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1308/6106/files/5980382078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lufixupiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1938/5504/files/savarifejinod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8640/5029/files/adobe_premiere_tutorial_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/lenipovexerudumupelutefad.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 8

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_off0000627b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 5344 bytes
SHA-256: 415ce2f43c58c3677664f40f2666983ecfeb725520a33b6595c02a75273a6379
font_01_sfnt_off000074a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A0 10384 bytes
SHA-256: a6a17861076eb408784c86520cca8b3a8e6112dccde7cac64e39eaa5d4ed3ad5

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