Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a92130fb72ab3e…

MALICIOUS

PDF

59.6 KB Created: 2020-08-11 17:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dccc7493d9b73c1991fd151f1388695b SHA-1: c821be560a3f3c35a843c2ff35eb890491945c0f SHA-256: 77a92130fb72ab3e398d3b259863ed6ef33f73637bb96b548475c0f7ada910f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links to external resources, masquerading as PDF downloads. The primary link, https://ttraff.com/pify?keyword=skewness+and+kurtosis+problems+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL, suggesting the intent is to redirect users to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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.com/pify?keyword=skewness+and+kurtosis+problems+pdf In PDF document text
    • http://files.northwestindianaoutdoors.org/uploads/1/3/0/7/130776674/a0b9d31fc8e2c.pdfIn PDF document text
    • http://zotigide.thegolphincollection.com/uploads/1/3/1/8/131871674/567af6fdc9d0.pdfIn PDF document text
    • http://files.rusticedenphotos.com/uploads/1/3/1/8/131857421/7165276.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/1/0438/2598/7734/files/632816095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7293/8399/files/dozupoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0641/9367/files/bijofedabazexen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/domeba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/60471231191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/sorting_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/cookie_clicker_save_editor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9875/0629/files/vijigogalasisibezunikug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7260/0726/files/35101676361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5129/4619/files/40342973955.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_off00009e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E3F 5584 bytes
SHA-256: 123167f1e613b9392b16b28f4821666d4831e0b96e988d9e3f9098e039fb6a79
font_01_sfnt_off0000b132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB132 15448 bytes
SHA-256: c8fc1ee34970f42e3363b3f9a9ef8b03fe8977c84efbfb42af356119e023da9b

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