Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58f320b6da37cd1…

MALICIOUS

PDF

38.6 KB Created: 2020-08-24 06:18:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d3da4d59faeb8eb9c09b6cdc8f4709af SHA-1: 7c1ff20044c983493aecc8278e248cc57bb3f350 SHA-256: c58f320b6da37cd1d4bd13ca19198841bf6725fd0c5746b82769805eef000fca
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a critical heuristic firing indicating it redirects to malicious infrastructure. The document body, though partially corrupted, contains the URL https://ttraff.ru/pify?keyword=balanced+equations+worksheet+1st+grade, which is also listed as a malicious redirector. This suggests the PDF is designed to trick users into visiting a malicious website, likely for phishing or malware distribution.

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.ru/pify?keyword=balanced+equations+worksheet+1st+grade In PDF document text
    • http://files.itsbcei.com/uploads/1/3/1/4/131438500/7811776.pdfIn PDF document text
    • http://files.piedpyper.com/uploads/1/3/0/7/130738889/f45cbd.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/1/0434/4132/4184/files/88166699612.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/98393434581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7214/4038/files/zaduwi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/37331859570.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1052/2268/files/raxopijoviwo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1236/6241/files/refraction_of_light_through_prism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/32902389309.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4950/files/a_for_apple_alphabet_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/70375015385.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/riselif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8326/8257/files/migubeluxufew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/marifurozijuzaledenikegi.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_off00005796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5796 5584 bytes
SHA-256: 4c105740d129304130211569523ac1a8cee5bf963d3b80d9f55362131c5c1e85
font_01_sfnt_off00006a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A94 10276 bytes
SHA-256: 0f6e99efec2f851a47ef267f907e66f7acbeb93b28aa09ba985cdcc53c461e4c

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