Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e836a917dda90f1…

MALICIOUS

PDF

38.1 KB Created: 2020-08-24 17:02:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 76cd13715607a49e1c159763a1b029dc SHA-1: 6739896b29a4b3e0f85e2f521af24fb6ac9fab6e SHA-256: 4e836a917dda90f1fbf3c2129b92254b78dea8826b878aea97ea242c5862fbfb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems

The PDF contains a large number of embedded links, many of which point to a link farm hosted on `ttraff.ru`. This infrastructure is known to redirect to malicious content. The document body itself is heavily obfuscated but contains the primary redirect URL. The presence of a link farm and a malicious redirector strongly suggests a phishing or malware distribution attempt.

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=leading+questions+and+the+eyewitness+report+prezi In PDF document text
    • http://xozigopi.cosmicbirding.com/uploads/1/3/1/6/131606289/7236870.pdfIn PDF document text
    • http://files.randiandmike.com/uploads/1/3/2/6/132695472/felumozu_nanibugufe_fipojozar_vunibubikowek.pdfIn PDF document text
    • http://jezul.ballywalterpci.org/uploads/1/3/1/0/131070702/6c87b0.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/1/0431/4942/6839/files/game_design_theory_and_practice_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1780/4708/files/zanezamafanobumirati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/56862489838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/section_15_of_cgst_act_2017.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/0765/6355/files/avast_antivirus_2018_crack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/nedalewonepa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/7433/3346/files/end_punctuation_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/35209966956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8450/4474/files/cell_and_their_organelles_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/86144738409.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 4

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_off000056b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56B4 5500 bytes
SHA-256: beee0bf6b4ec56085449f03f7a8e1a5264a54c577bc753481a3b274d68ed7757
font_01_sfnt_off0000697b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 10012 bytes
SHA-256: 2244f8c48679db370539b34e1c487280b5904775af27d1ab23f9acc5cb4c8be2

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