Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d4ac902bd26cfa…

MALICIOUS

PDF

50.5 KB Created: 2020-08-19 18:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1442236c54c7eb16b7fa3b90ffb5c802 SHA-1: 416a8872875b1907be7d5ead6f79f38e5f6f8e10 SHA-256: 26d4ac902bd26cfa5a96e6953347bd19b63549788c6f694005a1e0df47a738fc
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Imaginary lines on the globe worksheet' and the malicious URL, suggesting a lure to trick users into clicking the link. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many of which point to PDFs hosted on Shopify, likely as a way to obscure the malicious redirector.

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=imaginary+lines+on+the+globe+worksheet
    • http://files.themiserablenewyorker.com/uploads/1/3/2/7/132710671/viditezovimi.pdf
    • http://medidil.fremontbands.com/uploads/1/3/0/8/130874232/kivusikenuguz-bifas.pdf
    • http://files.focusedlearningsolutions.com/uploads/1/3/1/6/131636990/49d8e9.pdf
    • https://cdn.shopify.com/s/files/1/0434/0105/2312/files/bunizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/6698/2561/files/top_marathi_books_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2656/9633/files/aftercare_eyelash_extensions.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/najiferokalor.pdf
    • https://cdn.shopify.com/s/files/1/0454/5989/8518/files/british_sign_language_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0437/7555/7793/files/93024050184.pdf
    • https://cdn.shopify.com/s/files/1/0433/4016/9374/files/west_point_lake_level.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/fox_sports_m3u8.pdf
    • https://cdn.shopify.com/s/files/1/0437/2729/0518/files/34458040787.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/68817803409.pdf
    • https://cdn.shopify.com/s/files/1/0435/3818/6394/files/importance_of_seeking_knowledge_in_islam.pdf
    • https://cdn.shopify.com/s/files/1/0438/0547/4978/files/30932541645.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000079d5.bin
03fee331e111655c4cd3f25e64c3fb4fbca8c85bb1f59238a3e4e536fb7e0805		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D5 5220 bytes
font_01_sfnt_off00008b71.bin
6e3e598f096a6090854b40f3dd6e95df2b76daad43be0af2dc7072035d477682		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B71 10368 bytes
font_02_sfnt_off0000aed5.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAED5 4324 bytes

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