Malicious PDF — malware analysis report

Static analysis result for SHA-256 c36dcb0d9c0d3da4…

MALICIOUS

PDF

53.5 KB Created: 2020-09-02 07:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 119831985374043e41207fd3739ed000 SHA-1: 090f8a3ec02de8872c01394e8cc18821c91e2e26 SHA-256: c36dcb0d9c0d3da41f4cccb3a03c54c3dcd4a0ecc7f6b6bda88818cec0cfa6b0
214 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.me/wix?keyword=minecraft+avatar+creator'. This URL is presented within the document body, suggesting a social engineering lure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which point to Shopify and static.usrfiles.com domains, though the primary redirector is the most concerning IOC. The ML classifier strongly indicates maliciousness.

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.
  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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.me/wix?keyword=minecraft+avatar+creator In 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/1/0433/9243/4326/files/49637804885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6310/0070/files/3289942185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8999/3635/files/fm_21_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/tunukajijaramesagiduget.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c1615c_e2e033166f084bbf81f7a4da22f9ac85.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6260fe_559a14ca6d5146fc92f2202d407e95ed.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/48d9a1_9cf05a411501447ba41f0baea4d975c8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8c0e65_7a5c2fe7646f4617b1f5245a2f536cb6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_da91eb6cea424e249b9b5cf871653045.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/824332_7ac64c7ae5bb49319f0df46bd401ead1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_714e4135be8f4c96a179b8141231f395.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c3f59f_4fadfba615874d33bc1aa437ae20e4cc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_bedd8e080bf247bbb2d10ff3f6795f97.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1905/9868/files/mathematics_worksheets_for_grade_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3735/0293/files/32793009977.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000094d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94D7 4728 bytes
SHA-256: 152abecbd9031cc27af953a7b345db5e9e87f1da0bc5778a1db7505ef52be71a
font_01_sfnt_off0000a512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA512 10668 bytes
SHA-256: f51186d7730949e7c30893f54ad6b4b9b1936c120cf2d606a6b7894419803b8a