Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d42a4adb49fc21…

MALICIOUS

PDF

45.5 KB Created: 2020-07-24 07:08:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5dd83d14beaf8a923dc4d2fc3454384b SHA-1: a28869d1c37bd5b0daa20aadfd9dc9d9db9be82f SHA-256: 39d42a4adb49fc21e9813c6b9ca1f36471af545862cacc2e1f609f9045f8b089
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with many pointing to Shopify domains and one specifically to a known malicious redirector at 'ttraff.ru'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large collection of external links, suggesting an attempt to manipulate search results or distribute malicious content through a link farm. The document body is heavily obfuscated and does not provide clear textual lures.

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=android+xml+tools+namespace In PDF document text
    • http://files.francescagracenutrition.com/uploads/1/3/0/7/130775715/minemilejen_zimufuk_tugilotis.pdfIn PDF document text
    • http://files.plantmorenatives.com/uploads/1/3/0/7/130775200/gusolupelodoj.pdfIn PDF document text
    • http://files.carloshoyt.com/uploads/1/3/1/4/131408369/606ec1573.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/1/0431/5945/3860/files/nisizim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3337/7440/files/zasoxitojirezizidisuroxep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0216/6435/files/debovukakikakudab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5901/2006/files/22709746695.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5357/9430/files/59837697862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8303/8874/files/47628786933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0223/8888/files/tusiwerosusudelidesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6713/7438/files/62350985805.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53446206952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9636/7511/files/xegoviwabeneloxuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9525543421.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6227/0879/files/45456930221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/disexolaniwekejevubiko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70745323757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2087/0044/files/95080084966.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7158 5064 bytes
SHA-256: f2e38cb7e5962a3a51bba1b920f6ba47df3d2e25cfa480781858e067642b9fc1
font_01_sfnt_off0000826a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x826A 11548 bytes
SHA-256: 3786bea0b25c7084ca0caed930b36d6df309fdaacc87a7dbf33c959c6b8c055a