Malicious PDF — malware analysis report

Static analysis result for SHA-256 456504773aec11de…

MALICIOUS

PDF

39.0 KB Created: 2020-08-12 00:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bbe71f47be3771823d5c2e15c2dc9366 SHA-1: 5c9c42cbc9542b3c9c762b6ddb47f75a7c6914cf SHA-256: 456504773aec11de7b60c05a99a29722c0eedce9e3e9bb81668490bd143cdc06
194 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many of which point to a redirector service (ttraff.com) that is known to host malicious content. The document body, though heavily obfuscated, contains the same URL as the primary malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a link farm designed to drive traffic to malicious sites.

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/wb?keyword=como%20ensinar%20portugues%20para%20estrangeiros%20pdf In PDF document text
    • http://vipuwe.twisted4kstudios.com/uploads/1/3/2/6/132683014/b03dc600aa60.pdfIn PDF document text
    • http://files.rewildscotland.org/uploads/1/3/0/8/130873717/tuxewabo.pdfIn PDF document text
    • http://juzewugab.muncasterfinancial.com/uploads/1/3/1/6/131636665/6870b.pdfIn PDF document text
    • http://files.acherrymoon.com/uploads/1/3/0/7/130738641/7887997.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/1/0443/3759/4524/files/aashto_t275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/doing_bayesian_analysis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3755/5864/files/24926033666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/7880/7705/files/aladdin_full_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1007/1460/files/82781200080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/fumusufenoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/gibet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6635/8934/files/sql_tutorial_tutorialspoint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/71927147942.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/dijazoferun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/papaxidemoremorasowunofir.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 2

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_off00005ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AC9 5232 bytes
SHA-256: f8887bc72dac3f9063e0c5be128f5e282d24e050c94f6fb7702c548ea53fa7f3
font_01_sfnt_off00006c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C73 10120 bytes
SHA-256: 0b1468b180643f74890db4b41f670256823d1391041c73cec3ec13652c37afa5

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