Malicious PDF — malware analysis report

Static analysis result for SHA-256 026ad8e52ff839c0…

MALICIOUS

PDF

44.5 KB Created: 2020-08-31 12:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4bba81ec2ffc0d5b7a89a97b79ef86b SHA-1: 6359a95dadd8694e14ab769ea01020087924329a SHA-256: 026ad8e52ff839c010c06ffab9bd0ff8550738c4cda921156f7eefcbb5418471
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically ttraff.com. The document body, though heavily obfuscated, appears to contain the same URL, suggesting an attempt to trick users into visiting a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wix?keyword=bsf+revelation+lesson+7+day+3
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0dd040_43395a0e5d6c4efa83b0c1b290850324.pdf
    • https://static.usrfiles.com/ugd/b11f6d_b72170bd1dd1444c92083b7dd4498a41.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9041e3a4ecf47f2bb1f5f26774a73c0.pdf
    • https://static.usrfiles.com/ugd/06497e_2dbdae080acc4e6b89428b30c3f593aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_4d77737b94d848dcb854940b484f6258.pdf
    • https://static.usrfiles.com/ugd/269bb8_fbdd9d8f039646e8b213cb7c0de81224.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/39391789225.pdf
    • https://cdn.shopify.com/s/files/1/0438/9447/2856/files/56285507298.pdf
    • https://cdn.shopify.com/s/files/1/0434/0577/0909/files/deviantart_template_gif.pdf
    • https://cdn.shopify.com/s/files/1/0447/5263/4005/files/21239471384.pdf
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/dozuxepuvo.pdf
    • https://cdn.shopify.com/s/files/1/0432/9157/4430/files/maxaremexit.pdf
    • https://cdn.shopify.com/s/files/1/0429/2493/3283/files/32948823913.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/tovoxeluvuwakifikujoluno.pdf
    • https://cdn.shopify.com/s/files/1/0433/9436/7644/files/inmunoglobulina_antirrabica_humana.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fae.bin
df03c4fc130a8dc8d584594593fd0f1ead9f262c4f37db6589c6b9cca9ac814a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FAE 5356 bytes
font_01_sfnt_off0000820a.bin
16b9609f22f17233f67c285d9a3de14ae0c4d78e6cc33a407c135591677329ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x820A 10264 bytes