Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ecd83f88f6d990…

MALICIOUS

PDF

48.7 KB Created: 2020-08-25 09:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dfa28fec97107da6fbc99c6265a41bd1 SHA-1: b30e31e4f4e8734923d91cb58f8969e39eea7676 SHA-256: 16ecd83f88f6d990da91b5bdd69e638b12da049142f7d9945f0825701c41c8fe
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 benign Shopify URLs, but one critical link redirects to the known malicious domain ttraff.com. This indicates a phishing or scam attempt designed to lead users to malicious content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=aashiqui+2+video+song++mp4
    • http://files.amasamasonlyman.com/uploads/1/3/1/4/131437194/jazigo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4070/9527/files/mcgraw_hill_biology_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0440/7109/2376/files/24774120596.pdf
    • https://cdn.shopify.com/s/files/1/0433/9128/7461/files/69665676093.pdf
    • https://cdn.shopify.com/s/files/1/0437/7231/3751/files/92444602060.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/jexedamesemep.pdf
    • https://cdn.shopify.com/s/files/1/0430/6688/4250/files/informative_speech_topics_for_high_school_students.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/2_dimensional_shapes_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4143/9400/files/butezawewawofitulavam.pdf
    • https://cdn.shopify.com/s/files/1/0432/6568/7717/files/51887966336.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005710.bin
ce35e072f0d75bfbf62cbd2fb2b39e9e0d106b5c732410711f39fe1016151a92
pdf-font-stream PDF embedded font (sfnt) at offset 0x5710 5640 bytes
font_01_sfnt_off00006a15.bin
78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A15 2092 bytes
font_02_sfnt_off000073ba.bin
70b58e208262de37521be438b295619898832cf3c4bd7bbb80112589ae2b560c
pdf-font-stream PDF embedded font (sfnt) at offset 0x73BA 10596 bytes
font_03_sfnt_off000097ff.bin
6d157e5b6d2c2eb90b78eaea3d0340d0792f6fe728c8d867d7cd983cb2852231
pdf-font-stream PDF embedded font (sfnt) at offset 0x97FF 18996 bytes