Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbfb6bf0f3dbd452…

MALICIOUS

PDF

43.3 KB Created: 2020-08-24 20:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1f5bb30732e964b95fc5de39c743137 SHA-1: b4e98b3c4bfdcfd26450d3bb7112685937b072a8 SHA-256: bbfb6bf0f3dbd452264cfe979ec204f0f959c43de764f24ea3102ff339629696
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources, indicating a link farm. One of the primary links, 'https://ttraff.cc/pify?keyword=dreamweaver+full+website+templates+free', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to website templates, likely serving as a lure to encourage users to click the malicious links.

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.cc/pify?keyword=dreamweaver+full+website+templates+free
    • http://files.roundbedoasis.com/uploads/1/3/1/6/131606133/7813707.pdf
    • http://files.mworchestra.com/uploads/1/3/2/8/132815181/niluluwiwaro-kufisigelumusok-nisenaga-patokilofu.pdf
    • https://cdn.shopify.com/s/files/1/0440/5588/8022/files/bohr_model_of_hydrogen_atom.pdf
    • https://cdn.shopify.com/s/files/1/0428/6028/2023/files/relevonezube.pdf
    • https://cdn.shopify.com/s/files/1/0440/7253/4166/files/munkres_calculus_on_manifolds.pdf
    • https://cdn.shopify.com/s/files/1/0430/7343/7845/files/pewifizobugivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0004/5465/files/46300869505.pdf
    • https://cdn.shopify.com/s/files/1/0450/4626/8054/files/candy_candy_manga.pdf
    • https://cdn.shopify.com/s/files/1/0432/0755/7283/files/causes_of_world_war_two.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/jazekuvaleza.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/64021129715.pdf
    • https://cdn.shopify.com/s/files/1/0439/8045/6094/files/63734305915.pdf
    • https://cdn.shopify.com/s/files/1/0458/1182/6854/files/wordscapes_answers_ravine_9.pdf
    • https://cdn.shopify.com/s/files/1/0431/5499/7402/files/pulmonary_nodule_guidelines_radiology.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006144.bin
48b3ec9f766aa4932f344b8cd6e86683eafd75261fc61aafc7f0358324305dc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6144 5340 bytes
font_01_sfnt_off0000735e.bin
2b17894289ef4ac549ca5ccbfe538e6ebde94701791c0542cba9a71f2d67f349		 pdf-font-stream PDF embedded font (sfnt) at offset 0x735E 2268 bytes
font_02_sfnt_off00007d71.bin
8777c171b917cf9cd5c8fa86dbfafa7065948d5f6c6ece0a89c54e3a6854c557		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D71 10060 bytes

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