Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd3ac0e58b41336…

MALICIOUS

PDF

33.1 KB Created: 2020-08-19 18:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 094dd95485a8b4eeb21b039ec7a70446 SHA-1: 150d541daedca8cc626d1fe81e0387c4f7c16595 SHA-256: ffd3ac0e58b4133674ddd64b1019664648cbb6266252fc790d6fdae0bdd39f8a
234 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body text is largely unreadable, but the presence of the malicious redirector and the link farm heuristic strongly suggest an attempt to lure users to malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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=beaufort+county+school+uniform+colors In PDF document text
    • http://miwoxe.fishbowltx.com/uploads/1/3/1/8/131872203/gidixexitifotofumif.pdfIn PDF document text
    • http://files.dlitefulchocolat.com/uploads/1/3/1/4/131437832/e39e390bcdd639d.pdfIn PDF document text
    • http://files.floridaseniorcenters.net/uploads/1/3/1/4/131453302/2293478.pdfIn PDF document text
    • http://files.spanishfluencyacademyforyoungsters.com/uploads/1/3/0/8/130814575/gapil.pdfIn PDF document text
    • http://files.bobbycarpenterllc.com/uploads/1/3/1/4/131437725/1b91e91814f0486.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/1/0431/4133/3147/files/15650118848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7050/4608/files/ponujufare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7709/8913/files/simple_file_upload.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/dutogarafikon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/wasufifemonebeliwemit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6924/2534/files/39123869600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/building_construction_by_mckay.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/35205361614.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/vevaguzageked.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 5

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_off00004537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4537 5272 bytes
SHA-256: 3e121c77247e9e84decc356a4013e7b840fe14fce7007a97ee257272cb9e703a
font_01_sfnt_off000056fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56FD 9520 bytes
SHA-256: 281f1248ae4ef6e6616fb0f245acf86a6a2d9754d33d2c51d8d8163718d880b7

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