Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb58af38cd768614…

MALICIOUS

PDF

42.1 KB Created: 2020-08-13 23:45:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fc3a0bd96b89b22d7648d210e92a3b77 SHA-1: 38397cb2a6673c3d8c2ddfbb979a9a446a2768bd SHA-256: fb58af38cd768614c674cbbff23c927dd1c3d869fd2f22c02a65a147b01ba508
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the target URL and appears to be a lure for educational content.

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=math+worksheets+on+slope+and+y+intercept In PDF document text
    • http://gepivapet.rodmellfund.org/uploads/1/3/1/4/131453329/8382f275bab2.pdfIn PDF document text
    • http://files.crystallizationspa.com/uploads/1/3/0/7/130739810/59261d314.pdfIn PDF document text
    • http://files.asaswallhangers.com/uploads/1/3/2/7/132712093/3206857.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/1/0440/1351/9006/files/how_to_clear_cache_on_macbook_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fakuwonilojovaxibudebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8770/7804/files/26344541532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/4292/5726/files/open_file_in_browser_js.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1956/5216/files/american_college_of_obstetricians_and_gynecologists_guidelines_preeclampsia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13977314479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7259/3820/files/77436556976.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3001/files/83743007291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0979/4463/files/36334100467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1158/files/garafekagiwex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5488/3231/files/37954078275.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_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 5424 bytes
SHA-256: 7796e9e5e974be9a9c8b2d165e4e35a2a9cf2b9621b8235961224b81eb48df31
font_01_sfnt_off00007679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7679 10276 bytes
SHA-256: 3eba35fb67cd2289c4e7984922e1442a81a1fbf23bd31894e4defce01b8c24fb

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