Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f1a6df767a20b9…

MALICIOUS

PDF

43.3 KB Created: 2020-08-26 18:15:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 53b3d1dd6133d0c2cdfa0a1a2f6bb9f6 SHA-1: 0b8ac386fbb4117b72a721af1840f86ca9e958bd SHA-256: 78f1a6df767a20b92a72fd436d182abf7e174c3aa458439fa59c9e1c28685596
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a primary redirector identified as malicious. The document body, though obfuscated, contains references to these URLs, suggesting a phishing or scam attempt to redirect users to malicious infrastructure. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent to distribute harmful content.

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.ru/pify?keyword=walter+piston+harmony+pdf In PDF document text
    • http://zezox.ridgeroasters.com/uploads/1/3/1/4/131453598/dd1a6df63d5.pdfIn PDF document text
    • http://nisut.uslasoccer.org/uploads/1/3/0/9/130969742/2038437.pdfIn PDF document text
    • http://files.mywhiteengineering.com/uploads/1/3/0/7/130738803/xetakut.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/1/0428/2499/0887/files/zopabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8450/5498/files/talegoxenereb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9588/3925/files/29410793701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6350/9141/files/all_my_loving_ukulele_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5797/1362/files/76323180957.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/358201933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7079/1573/files/pictograph_worksheets_grade_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1471/7597/files/bayesian_inference_and_decision_theory.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/detailed_lesson_plan_in_english_adjectives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0639/9388/files/aliran_ahmadiyah.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_off00006aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AAA 5396 bytes
SHA-256: 4686516e211fdba2e8db061c21121df57242e9eb24c6acef202c9e55c067a499
font_01_sfnt_off00007ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE0 10396 bytes
SHA-256: b30f5b9690fe4164c93b1b429ae33b1c7b313e978e241f3e27809ab4e4ad18ac

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