Malicious PDF — malware analysis report

Static analysis result for SHA-256 756d8e2de469f67d…

MALICIOUS

PDF

33.7 KB Created: 2020-08-21 00:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cbeef1616b53d740278c79e5f42f78e3 SHA-1: d636884db9e46d4292671d878312e588cab590e2 SHA-256: 756d8e2de469f67d6026c0dbeb9950670733613eee3aba33e94a54fa7abbe7da
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, and a critical heuristic indicates it's a link farm. A primary URL, 'https://ttraff.ru/pify?keyword=solaredge+10kw+inverter+data+sheet', is identified as a malicious redirector, suggesting a phishing or malware distribution lure. The ML classifier strongly flagged this PDF as malicious, supporting the observed link farm and redirector behavior.

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=solaredge+10kw+inverter+data+sheet In PDF document text
    • http://kumolop.montrealbicycleclub.com/uploads/1/3/2/8/132814930/107303.pdfIn PDF document text
    • http://files.motivationalfoundation.com/uploads/1/3/1/3/131383434/ginevaredosu_pafupunew_ripikobuvi_liwesulaf.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/1/0437/3889/0394/files/avira_phantom_vpn_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/77492288585.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/2449/3213/files/semulote.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/10060026676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4337/2703/files/iterm_switch_panes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9466/1538/files/kezubezovelobemotalisol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7118/3777/files/retinopatia_diabetica_grados.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2623/6071/files/lileg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3282/8314/files/58709730268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2583/1835/files/38553187563.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 4

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_off0000457a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x457A 5600 bytes
SHA-256: f3176806fec8807d5473026861e03bdf3a3a405128b24b52fb1eb31c7c0ff093
font_01_sfnt_off00005898.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5898 9764 bytes
SHA-256: f2513ad53ef7524d4bb5c25c8d3aa286dde819c6c8c2c80f43bfc92861b048e1

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