Malicious PDF — malware analysis report

Static analysis result for SHA-256 4145caaba3eaed9f…

MALICIOUS

PDF

46.0 KB Created: 2020-07-28 10:58:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3a31095962e3243480f65cac77463cb4 SHA-1: 51dc8e2d4532b3fb87c9a743f27780e2fb401d16 SHA-256: 4145caaba3eaed9fb4f76e4bad268a182e0bddcb3c1a4ce268affc7f5be4cc94
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a mass external link farm, with many links pointing to Shopify domains hosting other PDFs. One critical heuristic indicates a link to known malicious redirector infrastructure at 'ttraff.ru'. This suggests a phishing or scam attempt, likely to lead the user to download further malware or engage in fraudulent activity. The presence of a 'download button' heuristic reinforces this interpretation.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=securecrt+free++cnet In PDF document text
    • http://files.delavinadesignsco.com/uploads/1/3/0/8/130813448/aac8b0785c43.pdfIn PDF document text
    • http://files.sujokmalaysia.com/uploads/1/3/0/8/130815093/dofaruw_zufemupegi_siletamer.pdfIn PDF document text
    • http://files.brandtechnology.com/uploads/1/3/1/8/131856027/1587895.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/1/0436/0096/9896/files/dakenaboripas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4914/8838/files/rabonixedekosubuken.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5106/5243/files/29458703147.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3406/7615/files/kixutaxibarogunapuluvoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0091/4343/files/sinubakeriko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3291/9720/files/jiwilosivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2195/9325/files/zizabujasuwadapur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/59170583375.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5348/2135/files/losetofovevepoxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6277/1366/files/nakopavulubuxadumisalal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0144/4512/files/lixenowesojaxujuwejuvok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7379/7285/files/99416418634.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 7

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_off000078c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C5 4284 bytes
SHA-256: 219c2cf49b6e222e48c2d30a09d78395dc9b0fe1606b9641789701a7b735f65a
font_01_sfnt_off00008755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8755 10448 bytes
SHA-256: bddbe33416fd03298cf21137f9505086f2c4f409207c27001b866a2a66e9c290

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