Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b022df2a69a3153…

MALICIOUS

PDF

48.1 KB Created: 2020-08-31 06:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e67350fa4c29f20c76c1adbceb12b8dc SHA-1: 8df4076abe21558b6c1ada4031cac156b61484f7 SHA-256: 5b022df2a69a3153a2d7bf19f2fff7a9bd2fcb9078f7bc389ddf61844b495323
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for instrumental music files, suggesting a phishing or scam attempt. The presence of numerous external PDF links further supports the idea of a link farm used for malicious redirection.

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.ru/wix?keyword=supreme+clientele+instrumentals+zip
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/50c35f_64f8d2430aae480d9f2b1ece2d8d5637.pdf
    • https://static.usrfiles.com/ugd/cc14e4_b67a654ef2424032ac8c46a6b02f6189.pdf
    • https://static.usrfiles.com/ugd/f1d680_6a8499fa5cd04296932862779c1b9b75.pdf
    • https://static.usrfiles.com/ugd/e73fea_c74a5da3007f440b8334e0eca911797f.pdf
    • https://static.usrfiles.com/ugd/7603ae_185bf58d8c2b480a895988dad3ec5116.pdf
    • https://static.usrfiles.com/ugd/cc14e4_3a993abba376411f80f067f31d400877.pdf
    • https://cdn.shopify.com/s/files/1/0437/9194/1781/files/carcinomatosis_peritoneal_ascites.pdf
    • https://cdn.shopify.com/s/files/1/0437/9030/3393/files/84233759889.pdf
    • https://cdn.shopify.com/s/files/1/0462/4351/2474/files/coldplay_the_scientist_piano_sheet_music_easy.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/sensory_evaluation_of_wine.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/nokulipefute.pdf
    • https://static.usrfiles.com/ugd/429b25_07a02df264b444f3aa903fbc5d6a808c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ed0b716124984bd295055a03a17a085f.pdf
    • https://static.usrfiles.com/ugd/9ea91e_2edb23c47a9a460aa5ac99b1381a5ad1.pdf
    • https://static.usrfiles.com/ugd/9ea91e_c2837b6cb3044912a58d2b1538b80198.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_off00007e79.bin
cfbb53c4069811bb3923716b0c4714c36e78b704563cd713ed4f76043f02e22e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E79 5232 bytes
font_01_sfnt_off00009034.bin
5a0579a736db0e73b672128822dc0591eb967c70a6adf2d2a6b9e821244eabbd
pdf-font-stream PDF embedded font (sfnt) at offset 0x9034 10432 bytes