Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c937af924946535…

MALICIOUS

PDF

40.7 KB Created: 2020-08-11 09:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 89f77a19c3a866fa38928ffd0a09a77f SHA-1: c6d123b8af35867fa45a0aac2c40fbcf60d5f66d SHA-256: 1c937af9249465353ccc492d50e750a8750074542cd0bcadb4cec32bc29d1972
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for learning guitar. The document body, though heavily obfuscated, contains the same URL and other URLs hosted on Shopify, suggesting a link farm or redirection strategy. The primary malicious URL is ttraff.ru, which is known for redirecting to malicious content. The PDF also contains a large number of embedded links, indicating a link farm strategy.

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=aprende+ya+a+tocar+guitarra+pdf In PDF document text
    • http://files.ftcyouth.com/uploads/1/3/1/0/131070393/siluwerufimebob.pdfIn PDF document text
    • http://kekomi.tracelearningcenter.com/uploads/1/3/1/6/131606289/koxozezeli.pdfIn PDF document text
    • http://files.greaterlouisvillechapteraacn.org/uploads/1/3/0/7/130739802/84598689d4.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/1/0427/9946/4611/files/zetivaxonuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8375/1831/files/ncert_science_class_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0726/2370/files/angularjs_read.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5366/8769/files/pi_in_hex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8181/0595/files/tawopozadofevodesezew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6651/files/safox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8938/7939/files/lafiseloza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/kegilat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/gedijanasupaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9330/2178/files/blossoms_of_the_savanna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1802/5117/files/alter_ego_b1_corriges.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/66541571973.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 2

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_off00005df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF5 5204 bytes
SHA-256: 6aed666652ffb4fbaf5fd2c4099afed7016aded8b0fda2544ca390590d780709
font_01_sfnt_off00006fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC1 11292 bytes
SHA-256: 7dd74156586428e92ec7329108dfbc4eaba550ce951d0ffd0d0a5e770dcf7bb2

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