Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ac8a30838cf58e…

MALICIOUS

PDF

60.8 KB Created: 2020-07-30 21:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cac1b0c1d7ac251c88292f2b20b5b01c SHA-1: dfad9ac99079c02fe65a0229d10676b439e3ecf5 SHA-256: 16ac8a30838cf58ec4d923390df6758084568c3d3dabc66976a00bb9c545baec
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and link farming, specifically pointing to a redirector URL. The presence of a 'download button' lure further supports a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to redirect users to potentially malicious sites, likely for further exploitation or credential harvesting.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=google+docs+pdf+ocr In PDF document text
    • http://files.tabithafitness.com/uploads/1/3/0/7/130775907/e08bb584e.pdfIn PDF document text
    • http://files.bryangatescfi.com/uploads/1/3/1/4/131406781/lujufi_tizefa_tidapu_sunazuzem.pdfIn PDF document text
    • http://files.dannyscholtze.com/uploads/1/3/0/9/130969636/bc93e4c6345.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/1/0440/0129/6534/files/lavejoxofonusipunotamuxid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5018/8443/files/zetowoturebenar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6854/5442/files/betonafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6259/9586/files/tekewuvixizobifazesimal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/daselibinuranenaxege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3894/6981/files/jibisedizez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/kurigovelokudelarexogew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/97971301923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/votitiwunoba.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off0000b5e9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB5E9 27124 bytes
SHA-256: 759d0ba8bd8abadd55a1e76000a0b55a629946e355450bbe76c4c6d0b5e07da6
font_00_sfnt_off0000835a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 4696 bytes
SHA-256: 0af56c4baa50d9e1c34228dcfc953d0cead548a4ddeff0606580f88081fbaec9
font_01_sfnt_off0000936c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936C 10108 bytes
SHA-256: f1f4ba937425a4a896797c2a5fff3f095a911e3da74c2c7ebd766169b1ddd082

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