Malicious PDF — malware analysis report

Static analysis result for SHA-256 4be3f655fa817b98…

MALICIOUS

PDF

38.0 KB Created: 2020-08-25 06:29:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8d44143c691b149e998e4fab454a0d75 SHA-1: 2c7a824b3dae1aab0535b6bb9be75bc0cd348561 SHA-256: 4be3f655fa817b98ccd4b811d64f336e7249c663096dd98c2d58535fb232e263
194 Risk Score

Malware Insights

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

The PDF document contains a deceptive message prompting an 'upgrade' and includes a link to a known malicious redirector. This redirector is likely used to funnel victims to further malicious content or exploits. The PDF also contains a large number of external links, characteristic of SEO spam or link farms, further indicating a malicious intent to drive traffic.

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.cc/pify?keyword=upgrade+32+bit+to+64+bit+android In PDF document text
    • http://xubogi.travellingscot.co.uk/uploads/1/3/0/8/130874359/1428536.pdfIn PDF document text
    • http://pulujefim.dkgwa.org/uploads/1/3/0/8/130813747/1809009.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/1/0431/5942/1092/files/rabugogima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/45340910475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/fejumuzimonizeponarabil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/nosafinug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/winobefipeterajulemubeti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6710/3645/files/sovirokoteme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9749/8535/files/22541096776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9700/5981/files/53447915115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8364/5599/files/before_you_accuse_me_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4783/7083/files/mongodb_aggregate_count_performance.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 2

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_off00005725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5725 5588 bytes
SHA-256: 91c066c25dc01760b366ee3e4045a97e5630c882ebe09b72d6d4f0e169b9a9d3
font_01_sfnt_off00006a32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A32 9688 bytes
SHA-256: 5038de89017e83f6720332b21063bdbf1d00a979e2c015d9fbe9689bc4e8c343

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