Malicious PDF — malware analysis report

Static analysis result for SHA-256 61bf6022d80fde5a…

MALICIOUS

PDF

42.6 KB Created: 2020-08-17 03:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6805d56ffdf183a72d80c38f1b202782 SHA-1: 95f080a4606397146112ee7b94868faea06f325c SHA-256: 61bf6022d80fde5aa8b866acfe4c5ca01235883042b77420e450b23c4858c1b8
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service designed to obscure the final malicious destination. The primary malicious URL identified is ttraff.com, which is known to host malicious content. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to direct users to malicious sites, likely for phishing or malware distribution.

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/pify?keyword=fnma+guidelines+on+texas+cash+out
    • http://zafifu.apollodrivingschoolhull.co.uk/uploads/1/3/0/8/130814328/xironowawum_xozezez.pdf
    • http://fuxupa.lesliedreyer.com/uploads/1/3/1/4/131407705/fitujelopa-jeverobinajezoz-jezugi-takot.pdf
    • http://files.mitchellwenkus.com/uploads/1/3/2/6/132681579/fd66669.pdf
    • http://fubefepe.matthewdrnovseklaw.com/uploads/1/3/2/7/132740900/1078865.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/chrome_plugins_viewer_disable.pdf
    • https://cdn.shopify.com/s/files/1/0437/0422/1849/files/priere_magique_pour_attirer_l_argent.pdf
    • https://cdn.shopify.com/s/files/1/0428/3724/6118/files/zutawa.pdf
    • https://cdn.shopify.com/s/files/1/0430/2825/0781/files/kiseribipijisudi.pdf
    • https://cdn.shopify.com/s/files/1/0429/6392/7206/files/mezosufij.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/63321034378.pdf
    • https://cdn.shopify.com/s/files/1/0429/1854/3523/files/21316860253.pdf
    • https://cdn.shopify.com/s/files/1/0434/0655/7347/files/barbara_cartland_espaol.pdf
    • https://cdn.shopify.com/s/files/1/0430/6678/5953/files/sisunejagugonorolizimani.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/77516316912.pdf
    • https://cdn.shopify.com/s/files/1/0437/2486/5685/files/xureguziva.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/59591103718.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_off00006875.bin
52d5f52e83df2dc19b462c76e222e7e94d3263124c38b3ae1958890a98989bd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6875 5280 bytes
font_01_sfnt_off00007a45.bin
32f20919ede5ee87c158425637e89f096228cb0045257ca83d6408e543d6823a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A45 10552 bytes

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