Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7f4721addd4e45…

MALICIOUS

PDF

56.9 KB Created: 2020-08-30 21:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 2083d88176995b7259de8ec78832d7ba SHA-1: c35c7ed81c82e84755b1b6b9348a92f47a19c82f SHA-256: 6d7f4721addd4e456c3dc311f4bb25115f16c3253de64d5c18342d0a5784e061
194 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to a redirector service, which in turn links to a malicious URL. The document body, though heavily obfuscated, contains text related to a Minecraft mod, suggesting a lure for users interested in gaming content. The ML classifier strongly indicated maliciousness, and the presence of redirector links confirms the intent to lead the user to harmful infrastructure.

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/wix?keyword=minecraft+1.10.2+furniture+mod In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/30e015_e298cfb1f74f4c619d2b97086498cecb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5d2cf3_71cfcb1eb9bc4313a28b71cd08a9a864.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6cf0f5_a641742b4cb1493bbc5aa3897e2adf94.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/10e3af_86b03b45e46a4d47b1f83bbf49851ed4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_60a2b0324e5e4562ad4f5ea1b57b51ee.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5933/9679/files/jitalavixitoweloruxuvu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5117/9416/files/45767973461.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9055/8622/files/defelogizidisupinejifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/36936719903.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5107/1126/files/vowofavazusokebokibog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/bmc-_91_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/pirubijosasozi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/information_technology_project_management_5th_edition.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8137 6568 bytes
SHA-256: 792e288023e4fbe73a0351c4e4cf94c19217598e688914c0413f09f13c1160d5
font_01_sfnt_off00009184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9184 5320 bytes
SHA-256: 2ffd42f281d9198f0f00cbd08fc3ddc700e37705c910a768cc08962df0495683
font_02_sfnt_off0000a38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA38A 3884 bytes
SHA-256: 003ab02c303e852db3a8e481ff72223f680efd8990f59815475b1354a47244f8
font_03_sfnt_off0000b2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C2 10196 bytes
SHA-256: 30b20350a13d8f2fc79fff6e550eb3148e9d0efcddb05544e5b85643185fd682