Malicious PDF — malware analysis report

Static analysis result for SHA-256 031350a62b88f105…

MALICIOUS

PDF

42.4 KB Created: 2020-08-03 20:31:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 13fe1e655fd1cf1f9b5d7cd4856b80a3 SHA-1: 892150b94718de8851565b3962339573c3e89cbe SHA-256: 031350a62b88f105fa8d25ff105cdba3072d7d367ab3a1daaebd5f6ffc0d9acb
194 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, includes the URL 'https://ttraff.cc/pify?keyword=mud+logging+sensors+pdf', suggesting a lure for free downloads or information. The presence of multiple SEO-linked PDFs and a critical heuristic firing for malicious redirector links indicates a likely phishing or malware distribution attempt.

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=mud+logging+sensors+pdf In PDF document text
    • http://files.openstudiocambodia.com/uploads/1/3/0/9/130969310/xakulavunokaxi.pdfIn PDF document text
    • http://nibadebi.hc4yf.org/uploads/1/3/0/7/130738524/kibibegufujana-zotanufe.pdfIn PDF document text
    • http://files.milwaukeephotobooth.net/uploads/1/3/1/8/131871419/700e32a98a8.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/1/0429/4334/8892/files/54209340641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9275/3049/files/how_to_delete_old_emails_in_gmail.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1542/1599/files/peguluxivuvoxetatolap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4977/1427/files/nolowuzevezus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5564/3809/files/42894900785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2282/6142/files/21760528516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9523/6509/files/79070944261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/java_bubble_sorting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3710/6087/files/tardis_sounds_effects.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 3

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_off00006a3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3B 5004 bytes
SHA-256: 4791273c1e76792602b743fb33ee979d61f4e361f75e60ee9c028dbef43bdc61
font_01_sfnt_off00007b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5D 9968 bytes
SHA-256: fa74473559fde1febdcd604810baa105b7b8a48465f4a72e894446ee91b4abbf

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