Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd9684b50ff5e93c…

MALICIOUS

PDF

47.2 KB Created: 2020-08-11 04:41:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4b5354c63d6257de5890375145558037 SHA-1: 1ac3708e2e5619473ac172a7a9a7620a03de078c SHA-256: fd9684b50ff5e93c9cf32278d850a251a7861d3830e05720c193fa8ff1e3f358
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a critical link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=end+of+4th+grade+math+assessment+pdf'. This indicates a likely phishing or malware distribution attempt, leveraging the document's apparent content as a lure. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. No scripts were extracted from this sample.

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=end+of+4th+grade+math+assessment+pdf In PDF document text
    • http://files.wellspring-contemporary-art.com/uploads/1/3/1/3/131379312/9db8c8ce1e65.pdfIn PDF document text
    • http://files.tobydehay.com/uploads/1/3/0/7/130739951/lebetolexomoru.pdfIn PDF document text
    • http://files.genesiscarconcepts.com/uploads/1/3/0/7/130776225/fetaf_woramokurusomo_solonarofile.pdfIn PDF document text
    • http://files.redroomyoga.com/uploads/1/3/2/6/132681658/nejukekipifujas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/vuzenesilataw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pewowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vibuzos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8842/9724/files/mangrove_rhizophora_apiculata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4623/0426/files/arquitectura_de_un_software.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3278/6597/files/46804959609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/tukidivuvofemuxokawapagax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4542/9160/files/98050273430.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/99863957298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/dukijazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2548/9305/files/english_articles_a_an_the_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/nuxiwofenan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9522/6523/files/palm_trio_650.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006aa2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA2 5208 bytes
SHA-256: 041cdf7ae574688e665ddccf90e9ed103e07e469acbc8f99792d443981ff3abc
font_01_sfnt_off00007c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2E 11256 bytes
SHA-256: 7c368f227de4fdd79c5b3090acf232baeeba04a719171e8b07e2ea0d409df8d0
font_02_sfnt_off0000a133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA133 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c