Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5870cf409901e50…

MALICIOUS

PDF

45.1 KB Created: 2020-08-03 22:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f37380b2ca12e972200fdef47c5addfb SHA-1: 6219d265b72656ed1c4d16a5a73619a7c1b496da SHA-256: d5870cf409901e50dfbe2559b16bfef38cca4439068ed7474b4ada01806e0678
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, which is indicative of a link farm or SEO spam campaign. One critical heuristic firing identified a link to known malicious redirector infrastructure at `https://ttraff.ru/pify?keyword=ciclo+cardiaco+definicion+pdf`. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

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=ciclo+cardiaco+definicion+pdf In PDF document text
    • http://files.albanymnchamber.org/uploads/1/3/2/8/132814182/c2675c5d3a5.pdfIn PDF document text
    • http://files.cruisingwithdonandglynda.com/uploads/1/3/1/3/131381237/4639455.pdfIn PDF document text
    • http://files.marinadempsterphotography.com/uploads/1/3/0/7/130776439/4303673.pdfIn PDF document text
    • http://files.distantseasministries.com/uploads/1/3/0/7/130775379/7348583.pdfIn PDF document text
    • http://files.stlcreativelandscapes.com/uploads/1/3/0/7/130775080/vezagusikaviki_jitopasirex_butezesos_mabilali.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/1/0430/5122/1146/files/wexuvafalupovev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5727/5299/files/65603755154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7718/0328/files/xeginofiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7677/1224/files/xuborisejajafewagerelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2865/9869/files/dudawupapozulekusejowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fuxojusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5093/4173/files/bellerophon_and_pegasus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6910/files/wuxupodasuzobuginovek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0383/7592/files/27374955891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/xojapagunutopebetexet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2890/6138/files/46201910370.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_off00007205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7205 4876 bytes
SHA-256: 24a5ac3edc72e2ba9a9dc5d39d949ad5cf0615fe340ee5da5366f26af3827b55
font_01_sfnt_off000082aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82AA 10920 bytes
SHA-256: 7912a8ed56a006c124b3a80a914142e88978c601fbb05c01d375149a0ffc7115

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