Malicious PDF — malware analysis report

Static analysis result for SHA-256 8435480a6d587a3f…

MALICIOUS

PDF

72.7 KB Created: 2021-01-05 05:16:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7fdfc0774fda9cfadad665a942f65927 SHA-1: b4428bc2882db61e2aa9968c4c67747bb6381f12 SHA-256: 8435480a6d587a3ff3e3bb39fdc140f45d902f1e94d4f4d0b4fd7c708829aba7
76 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a heuristic indicating an external URI pointing to a URL associated with "angry birds 2 gems hack apk". The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of the suspicious URL and the lure within the document body suggests an attempt to direct the user to a malicious download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/aws?utm_term=angry+birds+2+gems+hack+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386830/normal_5f938e008e57e.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/hh2XyeO/cross_stitching_thread_color_chart.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390068/normal_5fc19dc990f6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b38ac5a8-0ee9-476d-93a8-5dc286437915/83958869580.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/loxezijasusif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/600a5d78-841e-4623-ae36-9df90abf2895/dakefojufulo.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/adobe_illustrator_holiday_flyer_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e75cd7-e963-48b8-8e6b-30449bbb7afb/modaxefekeneralulufusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315739ed-0e2a-45e6-bd96-a8fc7d88072d/nidobemu.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/brahm_kavach_meaning.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/73222390082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24456fe0-de09-429b-af7f-303e7c28a9c1/20422037048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/378f8aec-0c74-4bce-ad4e-dfee6923ad14/54022309761.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDF 5880 bytes
SHA-256: 046d39e98a0f9a734052abcd85b1dfceac537d3b4ebcb69fcd8c06ef9b0993d9
font_01_sfnt_off0000f1c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C7 10612 bytes
SHA-256: 1821756b844444d613ed016f6496c7af2b495c78c07fa97c109932f3f1a14073

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