Malicious PDF — malware analysis report

Static analysis result for SHA-256 879a151ec806b3ea…

MALICIOUS

PDF

48.1 KB Created: 2020-08-22 09:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9e295ed2cd1546e56790540550928aab SHA-1: 61510c28e75810a27652a37e0cd34a2ef8d95e00 SHA-256: 879a151ec806b3eac391f4b87669989560dff367b38c2da9bfb0debbbdd8e236
242 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to redirectors and potentially malicious content farms, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The presence of a 'download button' lure (SE_DOWNLOAD_BUTTON) suggests a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=map+camp+nou+minecraft In PDF document text
    • http://files.bocksuper7.com/uploads/1/3/0/9/130969389/5332098.pdfIn PDF document text
    • http://files.auntiemaileshawaiiangourmetfavorites.com/uploads/1/3/0/8/130874237/7030284.pdfIn PDF document text
    • http://xakil.samanthaeveyoga.com/uploads/1/3/0/8/130814328/ba3ce07eab1b.pdfIn PDF document text
    • http://files.designauthentic.com/uploads/1/3/2/6/132695543/tafafotitefeso_kinujis_zurujavutu_bamowo.pdfIn PDF document text
    • http://files.georgiametz.com/uploads/1/3/1/4/131454549/6651506.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/1/0429/3407/5558/files/faxajisigikanidelewijes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7790/3263/files/47103724386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/60208546682.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7796/7778/files/dezotaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8073/6165/files/11524032477.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7623/1072/files/jivibaze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/23223855704.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1296/files/vtt_video_downloader.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_off00007fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB0 4956 bytes
SHA-256: 655409dca73e3e5ad51849e136061adae5aa54f3545a74f69471fe6918e3e407
font_01_sfnt_off0000907a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x907A 10368 bytes
SHA-256: a35d195c9ebd34622b2057e1b91c83c8b940e9c84bd6a2c63fac22dfb17393c3