Malicious PDF — malware analysis report

Static analysis result for SHA-256 1815cc1984d70c99…

MALICIOUS

PDF

42.5 KB Created: 2020-08-16 12:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fc18c7ba51ced0753895f777d960c10e SHA-1: db4e5914644f5fef2a58023edde5455edcc89d55 SHA-256: 1815cc1984d70c99feaaca60ed51599a0f0369cb6f6788830a17c38c85aecf9c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains the same lure text and URLs found in the heuristics, suggesting an attempt to trick users into clicking through to potentially harmful content. The presence of multiple Shopify links, some benign and some pointing to the redirector, indicates a link farm strategy to distribute the malicious lure.

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/wb?keyword=word%20picture%20recognition%20worksheets In PDF document text
    • http://files.melanievanzyl.com/uploads/1/3/1/4/131413485/retetuwe.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/1/0428/0310/1863/files/xogapidesofesasasaziru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/58990689683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/7506479437.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0545/1160/files/91646281453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0905/6668/files/malicious_sample_github.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3531/9702/files/attestation_employeur_cpam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0361/7173/files/mafebolemeramufixef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/ikea_catalogue_cuisine_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/sony_android_tv_4k_mkv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/2014_ford_focus_owners_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9443/4202/files/79540845543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8281/7441/files/arnold_blueprint_to_cuts_phase_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/74774381380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5056/3734/files/60954874400.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 1

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_off0000681a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x681A 5260 bytes
SHA-256: 519e36eaab63e8044a8f193469f989815cc52df6fd23b8def93d8cf6541d0749
font_01_sfnt_off00007a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 10192 bytes
SHA-256: 43d87d778cc7126a1a1413a4bfc1451cd581aa4a986dd425d562f145f54f49dc

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