Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e5643f8f54aa162…

MALICIOUS

PDF

76.4 KB Created: 2020-07-08 23:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-08-10
MD5: d01d55d1c662c31ab0464cad47336751 SHA-1: 4682dde886ef56095e384db8e606a434db1a42d0 SHA-256: 2e5643f8f54aa1625867887bd153e623678aa942f10b44415f6cdf8e6602bb0b
194 Risk Score

Malware Insights

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

The PDF contains numerous links to SEO redirectors, including a primary link to 'ttraff.ru', which is flagged as malicious. This indicates a phishing or scam attempt designed to lure users into downloading further malicious content. The document body, though heavily obfuscated, contains the same lure text and the malicious redirector URL, reinforcing the phishing intent.

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=software%20architecture%20in%20practice%20len%20bass%20pdf%20download In PDF document text
    • http://files.grizzlygrover.com/uploads/1/3/1/4/131483440/febisosalabag.pdfIn PDF document text
    • http://files.visionsusa.org/uploads/1/3/0/8/130813768/bda94a2cb883e4.pdfIn PDF document text
    • http://files.southernoiltransport.com/uploads/1/3/2/7/132740549/lovowa-xekeporil-wumewujaguj-sudagal.pdfIn PDF document text
    • http://files.marsjoyofpainting.com/uploads/1/3/1/6/131606127/1986964.pdfIn PDF document text
    • http://files.yogashak.com/uploads/1/3/0/9/130969910/zevuru.pdfIn PDF document text
    • http://files.freedomdolphindiving.com/uploads/1/3/2/6/132680994/244417b38e2a6.pdfIn PDF document text
    • http://files.dannysrods.com/uploads/1/3/0/7/130775983/tigozole_memix_tinev.pdfIn PDF document text
    • http://files.bellydancewalnutcreek.com/uploads/1/3/2/3/132303001/2f4246908f2.pdfIn PDF document text
    • http://files.ruthbumgardner.com/uploads/1/3/1/4/131407263/34b606873.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://sowupaxi.files.wordpress.com/2020/07/72826323985.pdfIn PDF document text
    • https://wevekemuvu.files.wordpress.com/2020/07/30022937548.pdfIn PDF document text
    • https://xufelositade.files.wordpress.com/2020/07/visiji.pdfIn PDF document text
    • https://winorafoza.files.wordpress.com/2020/06/dival.pdfIn PDF document text
    • https://lanuterepa.files.wordpress.com/2020/07/67640202953.pdfIn PDF document text
    • https://pexakepovovo683334651.files.wordpress.com/2020/07/47881252983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wajumibuxup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kiwovanigefuminif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81667611697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13578549785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75901524911.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jedufejaselikaruratemop.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_off0000ded0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 5460 bytes
SHA-256: 02964c205fa3367ba4d31e4400fb8ccf54c307896f550ab85ac5e22a65be5a9e
font_01_sfnt_off0000f152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF152 16384 bytes
SHA-256: b8e4db8d40b1a16a26e8643c3ebd5c82413bff92f2a51289efddb7e89f0539c7