Malicious PDF — malware analysis report

Static analysis result for SHA-256 71678b265d6fd529…

MALICIOUS

PDF

43.0 KB Created: 2020-09-13 06:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ee2ed77f799e67f44180ef44c9416fc SHA-1: e50a426d0e1d5819a34bffda917781ee5a45e51c SHA-256: 71678b265d6fd529edf040732534ad82f41ac2f084706597f1b259065ed31676
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a prominent link and a visual 'download button' lure, directing users to the URL https://ttraff.club/wix?keyword=call+of+duty+black+ops+zombies+apk+free+download+ios. This URL is flagged as a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • 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.club/wix?keyword=call+of+duty+black+ops+zombies+apk+free+download+ios In PDF document text
    • http://files.certaintysales.com/uploads/1/3/1/3/131381078/gajudewajojobor.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/1/0435/6915/2159/files/trifluoroacetic_acid_msds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/6351/4012/files/echo_registration_failure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/64000012642.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ac72e0_54acb8ec6d7f445681e64c106f738789.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b80405_64c176cb825549d2955393bb139a981a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5cd33b_a256487f68004900a333dd49c21a02af.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/868401_1ab3741a4f14495591d1086ad3135afe.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_off00005b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5F 3212 bytes
SHA-256: 27b748ee931503da7bbd748c21e6b962001e2b36dc9ea055ea975387d771fc72
font_01_sfnt_off000066de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DE 5652 bytes
SHA-256: 547f1bf19cdf9662873df3520f0796a960c58fe14771f18f898cc09ff528fd01
font_02_sfnt_off00007a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 10828 bytes
SHA-256: 39550baf30e57b65364a5845661dcd35f323976dcfe4f9db228141792b38201e