Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4197f2124a90eee…

MALICIOUS

PDF

39.7 KB Created: 2020-08-24 23:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e9f598197b240f63799f43aeba2eb8fe SHA-1: c6c66fdac0772b0b02603b8b6a0fc93598860082 SHA-256: c4197f2124a90eeee8dba66af441e99e23acb5fbd97c2775f4c38f5cf2425078
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a large number of embedded links, including a critical finding of a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=current+events+trivia+with+answers'. The document body, though heavily obfuscated, contains text related to trivia and current events, suggesting a lure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves tricking the user into clicking the malicious link, which is likely to lead to a phishing page or malware download.

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=current+events+trivia+with+answers In PDF document text
    • http://files.thefuturehollys.com/uploads/1/3/1/4/131452824/feworuramewata-lafad.pdfIn PDF document text
    • http://files.suryateguh.org/uploads/1/3/1/8/131856121/2654705.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/1/0463/0786/8834/files/lincoln_sync_3_android_auto_update.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/mathematics_for_economics_hoy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/8568/4897/files/14186314082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5557/0341/files/77509573454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/jasuzadokazojeketu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/test_bulats_anglais.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0382/2755/files/save_webpage_as_firefox_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0532/8034/files/rivibozede.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/zikawisokonerukifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1136/6309/files/refukedoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7408/3233/files/kitani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/87457531472.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_off00005d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D53 4796 bytes
SHA-256: 6427a91d90015ab6910b0164720e8c8f803c32ddfc548aa5692acdc090cd4fd0
font_01_sfnt_off00006dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAD 10748 bytes
SHA-256: 8d5d15223fef0afb4f4d9b2ce029d7587d95c4dfddae286bd6293cd829e09b79

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