Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a4a2199d591ea2a…

MALICIOUS

PDF

45.5 KB Created: 2020-08-09 15:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cc4a60c7705edcc41a4f75c2f5311195 SHA-1: 82097cdc0022d1e4386991ff9aa3a22645f647ed SHA-256: 0a4a2199d591ea2a3b15135f2b36faaedce83c0a3fac6d8cb34feb9eb6e28e89
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body text, though partially corrupted, includes the phrase 'Que es contexto definicion pdf' and the malicious URL, suggesting a lure to trick users into clicking through to potentially harmful sites. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=que+es+contexto+definicion+pdf In PDF document text
    • http://files.mytranstrainer.com/uploads/1/3/0/7/130775257/ca51c25bf.pdfIn PDF document text
    • http://files.rochesterkino.co.uk/uploads/1/3/0/7/130775055/2585960.pdfIn PDF document text
    • http://towetij.step-by-stepsurgery.com/uploads/1/3/1/4/131408738/desuvive.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/1/0433/0687/7080/files/dekafarisajanitid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9812/9059/files/ludojijowiloviz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gowaluzefep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/nude_mods_skyrim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8596/2142/files/chiang_mai_old_city_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57032902602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/zoviju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/colonization_of_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9702/2871/files/17484043772.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0885/1098/files/tigodusitoluninazekixurot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/tapafujeluwaxivuvuxoxonuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/zezoroxuk.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 6

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_off00007212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7212 4940 bytes
SHA-256: 4b8f921d7108f887bd3d5080b0023580b138884d2f59e7fbddf3e439713552ef
font_01_sfnt_off00008305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8305 11204 bytes
SHA-256: ff81909cc2333b80c6f10aee07d4449c5efaacc5e8544b957209109253f2c975

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