Malicious PDF — malware analysis report

Static analysis result for SHA-256 61818db40970ebe1…

MALICIOUS

PDF

44.4 KB Created: 2020-08-12 19:47:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f26348ec1dcc104e4069d3758afe0d19 SHA-1: 5d1f59bd2bd3370082479c4facde8f0cd50a2863 SHA-256: 61818db40970ebe1f34e7fdf558faf2725b9ae09b4e436faab5e1e0d6533595f
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The primary malicious URL observed is https://ttraff.com/wb?keyword=excel%20full%20formulas%20pdf. While the document body is heavily obfuscated, the presence of numerous links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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/wb?keyword=excel%20full%20formulas%20pdf
    • http://files.stlukeshhi.org/uploads/1/3/2/6/132680998/givibaboli.pdf
    • http://files.abqmobilenotary.com/uploads/1/3/1/4/131437604/6da8ebd7.pdf
    • http://gaduxipa.gina-myers.org/uploads/1/3/1/4/131453329/murisonewesol-fanemiwu-nonali-xuteki.pdf
    • http://files.rosamiliafornjea.org/uploads/1/3/1/6/131606069/6854889.pdf
    • http://files.tedxbostoncollege.com/uploads/1/3/1/3/131398076/2b3b849caf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/6050990943.pdf
    • https://cdn.shopify.com/s/files/1/0438/4689/3730/files/91915524418.pdf
    • https://cdn.shopify.com/s/files/1/0437/3993/8970/files/entrepreneur_magazine_september_2020.pdf
    • https://cdn.shopify.com/s/files/1/0438/0118/2370/files/gemulokowunarinunodop.pdf
    • https://cdn.shopify.com/s/files/1/0429/5763/5735/files/30573793491.pdf
    • https://cdn.shopify.com/s/files/1/0428/6909/6615/files/probability_color_by_number.pdf
    • https://cdn.shopify.com/s/files/1/0428/9898/1030/files/jejokixaxizopexo.pdf
    • https://cdn.shopify.com/s/files/1/0438/3545/7696/files/mofunaserojugupifaguwimo.pdf
    • https://cdn.shopify.com/s/files/1/0430/1648/7065/files/51568046766.pdf
    • https://cdn.shopify.com/s/files/1/0433/3735/1326/files/rusejodufopipigexowinap.pdf
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/jivadomiketomow.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/malinokoregotatag.pdf
    • https://cdn.shopify.com/s/files/1/0433/6061/6599/files/24631154327.pdf
    • https://cdn.shopify.com/s/files/1/0440/8419/9574/files/bloodstains_jeff_mudgett.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_off00006e85.bin
e4c969a103607df9746963077639b84ccdf747163a5ed8b9ec7a5a5daf908f0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E85 5328 bytes
font_01_sfnt_off00008088.bin
b026d4d7ec7ac31ac7fa69ba83ef76455cf29970bf5984e989311d36d5cdb0cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8088 10532 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.