Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b3f3446a98099b4…

MALICIOUS

PDF

52.9 KB Created: 2020-08-19 15:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee4060f9da8fd875a9b1c0930e626199 SHA-1: dcde043891b51c72d5b370883be372ee58811546 SHA-256: 9b3f3446a98099b4d3944b291364cb99a4a9bb7c0bff866a11910514eedf97f2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains multiple embedded links, with one critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=game+bid+wars+mod', suggesting a lure for users to click through to a malicious site. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy. No scripts were extracted, and the PDF structure itself does not indicate specific exploitation, leading to an unknown family classification.

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=game+bid+wars+mod
    • http://files.alinoraboutique.com/uploads/1/3/1/3/131380042/wasutenuse_ligelibaj.pdf
    • http://files.centreonc.com/uploads/1/3/0/8/130814535/088791e9bc.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/join_pdf_files_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/gutogex.pdf
    • https://cdn.shopify.com/s/files/1/0433/4141/4568/files/weekly_calendar_blank.pdf
    • https://cdn.shopify.com/s/files/1/0440/6371/9574/files/vyond_comedy_world_requestly.pdf
    • https://cdn.shopify.com/s/files/1/0435/3074/8055/files/95230827646.pdf
    • https://cdn.shopify.com/s/files/1/0431/2678/4157/files/effective_international_business_communication.pdf
    • https://cdn.shopify.com/s/files/1/0437/0454/9544/files/english_typing_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0454/7008/9382/files/vutiniwanujakuvetis.pdf
    • https://cdn.shopify.com/s/files/1/0433/7460/8545/files/media_creation_tool_1903.pdf
    • https://cdn.shopify.com/s/files/1/0432/8561/0651/files/adhkar_after_salah.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3809/files/suzuki_boulevard_c90_service_manual.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00006d97.bin
e6d9b4f581c7e8a45ddfb558b719b97d1928be595fcc751bc807f319e92379e1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x6D97 11528 bytes
font_00_sfnt_off00005bf2.bin
8afe05281abd03229f93fa38fe0cdb053cb3f20a2583c97af523f3ea259cd543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF2 5200 bytes
font_02_sfnt_off00008e36.bin
aaa1f0d2750e19b48d482a4666d3d0cd69705ca4cf40968cb1174922bf7a73d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E36 10216 bytes
font_03_sfnt_off0000b164.bin
ab862ddcc36e5f8abbcc0ec12f45ee2a0a0017beba85073a80867d3ee452b16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB164 16160 bytes

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