Malicious PDF — malware analysis report

Static analysis result for SHA-256 51d6229600db24bd…

MALICIOUS

PDF

40.7 KB Created: 2020-08-10 17:32:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc757d0edfc2b5907eb9da987c9e2c1d SHA-1: 1201e3671ad582796c5600b330c703b78b525fa6 SHA-256: 51d6229600db24bd6628c7fa36e9d5a981c8c204414ac104276377e90846f39d
152 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to `ttraff.com`, identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to malicious infrastructure via a deceptive link.

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=wedding+march+string+quartet+pdf
    • http://files.jackienorman.com/uploads/1/3/1/8/131860787/xewaguxevaxo_xarak.pdf
    • http://files.msdurrett.com/uploads/1/3/2/6/132681880/tanedo_nugal_bovusamov.pdf
    • http://files.asliagirbas.com/uploads/1/3/0/7/130776841/07f27bfa0f9527.pdf
    • http://allegroquartet.com/wp-content/uploads/2015/07/4-Wedding-march.mp3
    • https://cdn.shopify.com/s/files/1/0432/5978/9472/files/katozobazatusakikit.pdf
    • https://cdn.shopify.com/s/files/1/0437/9043/4455/files/journal_angina_pectoris.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2941/files/jomurozifubarebewofifizo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0032/2458/files/amiotrofia_diabtica.pdf
    • https://cdn.shopify.com/s/files/1/0436/0955/5107/files/aldous_huxley_as_portas_da_percepo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0301/8392/files/junupilivekani.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/kutoxudizope.pdf
    • https://cdn.shopify.com/s/files/1/0439/0577/7832/files/alif_ba_ta.pdf
    • https://cdn.shopify.com/s/files/1/0436/3668/7008/files/movies_278_hiram_showtimes.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/rto_learning_licence_test_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/4031/6319/files/15228689198.pdf
    • https://cdn.shopify.com/s/files/1/0433/3754/7929/files/temarabejarikabi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005eee.bin
e6a775e1336df77b8673c9451e08eddec3fae7a10086c4198b7d4ca893901659
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEE 5676 bytes
font_01_sfnt_off0000720c.bin
fef86651e5d750f12e0974baa8b3db19c4b30fbbf5cd5275bd20ac336e46cf47
pdf-font-stream PDF embedded font (sfnt) at offset 0x720C 10748 bytes