Malicious PDF — malware analysis report

Static analysis result for SHA-256 63cb834d41170b83…

MALICIOUS

PDF

43.4 KB Created: 2020-08-03 10:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8ed56e4f1e01326fb8d0cc37d9737363 SHA-1: 82d587c30934fbe38485d6533af9546f69e5920c SHA-256: 63cb834d41170b830086978dd53b3c3a041307b5ab5a4a647383b09dfe7a216c
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm designed for SEO manipulation, likely to phish for credentials or distribute malware. The embedded document body contains a URL pointing to a malicious redirector, which is a common tactic for initial access via spearphishing attachments. The presence of numerous links suggests an attempt to broaden the attack surface or generate 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=ra%253A+eldoradio+80s+cover In PDF document text
    • http://files.pfcmooremess.com/uploads/1/3/0/7/130776072/65264bc54.pdfIn PDF document text
    • http://files.kalaemano.com/uploads/1/3/0/8/130813777/babodumesud-bebowepefabif.pdfIn PDF document text
    • http://files.whichwolfwillwin.com/uploads/1/3/0/8/130813888/9678438.pdfIn PDF document text
    • http://files.atlanticharmonybrigade.com/uploads/1/3/1/3/131379748/124eee6f77b.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/1/0434/6265/6157/files/pavixemirivorebedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/bimuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9597/3276/files/vujofunil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/84419498341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lalosukiwafigoledexefes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0306/0128/files/7114728120.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/90730468770.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8455/4135/files/bisapemekovax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1825/files/nilopowesetever.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4075/8170/files/john_deere_750_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/98826922128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71895705060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0765/4563/files/49319880427.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 8

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_off00006240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6240 5388 bytes
SHA-256: a231962e6815c6fe985b1a0b9c6b22785739ca926442f079753b0c7a2c0723d2
font_01_sfnt_off000074a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74A5 14100 bytes
SHA-256: 146916d7ffe27e3f13bd399ec898e828b84a5ec3407c85ec7f83c25d22b76748

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