Malicious PDF — malware analysis report

Static analysis result for SHA-256 28e16ede4d1c14e4…

MALICIOUS

PDF

44.9 KB Created: 2020-08-04 06:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ea4451d5161c6421da7615e6c1e99cf9 SHA-1: d7b3214c2337f274fc041dd6cc25e7e59ae03c8d SHA-256: 28e16ede4d1c14e4410cb95a847568d1914c3b3faa3c75b4c2401068c32ffca9
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the URL that is used in the malicious redirector. This suggests the PDF is designed to lure users into clicking the malicious link, likely leading to further malware download or phishing.

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=surge+arrester+calculation+pdf In PDF document text
    • http://files.firstathens.org/uploads/1/3/2/7/132710687/9347935.pdfIn PDF document text
    • http://divudebu.revgretchenweis.com/uploads/1/3/1/0/131070674/dolor.pdfIn PDF document text
    • http://files.extonbury.com/uploads/1/3/1/6/131607331/siwerawe-nemopep.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/1/0431/5214/6587/files/70196921599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3063/1832/files/rolling_stone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9452/3552/files/jijolugolirekivorixipulid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/91470968289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8758/files/wematuru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6280/4136/files/55793791833.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/14729811371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36149341097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/46193383153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7735/4143/files/39030236240.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kumug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/bedajixeletorazipa.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_off0000714b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714B 5424 bytes
SHA-256: 585ab6a820dd3673f88c9e430a04bf1694a663d1d0498ac9cda1b52215255a7a
font_01_sfnt_off000083cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CF 10264 bytes
SHA-256: d84077a4c30cd19de2cd01d058c5489bdfc443584b7b9bcd36ff0b342cc02f55

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