Malicious PDF — malware analysis report

Static analysis result for SHA-256 463714ed52e85252…

MALICIOUS

PDF

39.5 KB Created: 2020-09-01 21:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f40794574dbfbcc9ce7e4d1282d851e7 SHA-1: 8677b174e92b5c54960b8e47043957f0a4383929 SHA-256: 463714ed52e85252b6d8ec1a3339845b713dc4bbf17e0d2c3787671eddfdc317
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it links to known malicious redirector infrastructure. It also contains a large number of external PDF links, suggesting a link farm. The primary malicious URL identified is https://ttraff.ru/wix?keyword=janatha+garage+ringtones+free++naa+songs, which is likely used to redirect users to further malicious content. The document body contains garbled text but includes the same suspicious URL.

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=janatha+garage+ringtones+free++naa+songs
    • https://cdn.shopify.com/s/files/1/0434/7723/7917/files/82295774994.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4393/files/4958805301.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/87507587295.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/56617372284.pdf
    • https://cdn.shopify.com/s/files/1/0430/0849/1673/files/59699355068.pdf
    • https://static.usrfiles.com/ugd/a31856_c19e4ed1e99b4b4e924b724200840509.pdf
    • https://cdn.shopify.com/s/files/1/0429/6015/8873/files/chemistry_class_11_chapter_1_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/3137/9618/files/pebedukobekurigitejefu.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/dunegisezuzigepavepa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0029/8648/files/99898935124.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/guru_vachaka_kovai.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/inductive_and_deductive_approach_in_teaching_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0460/1102/3519/files/tibaxafopogiximexetowa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/define_dilapidation_report.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/86680400381.pdf
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/toduwuvisadoledako.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_off00004feb.bin
f6a354a37c430d38940d80d4836e5d82834103ef027f54df49d6bcb0c1df6f34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4FEB 4988 bytes
font_01_sfnt_off000060e0.bin
dd2e93620d81f598b35d9977d3992e878c63df2346991dd402126ebf12a8f79a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E0 14804 bytes

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