Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab4d25c9cfa1e85…

MALICIOUS

PDF

37.2 KB Created: 2020-08-07 22:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d75fe981eade26ab2f8979e0a49652b SHA-1: 650ba8bcb601d0b1e0a642d46540b3795805323f SHA-256: 8ab4d25c9cfa1e85d46e9002fa29cb8d5187905c223c5de2e7e50699b845d527
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.cc/pify?keyword=bioreactor+system+design+asenjo+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to lure the user to malicious infrastructure. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=bioreactor+system+design+asenjo+pdf
    • http://nafivubag.soundcityreading.com/uploads/1/3/0/8/130813528/d8a0450bb.pdf
    • http://files.theayalas.com/uploads/1/3/0/7/130776401/kezezevut_zaliw_waruwolasusox_nulefob.pdf
    • http://files.illinoiscardinalsbaseball.com/uploads/1/3/1/4/131438348/069356a21572.pdf
    • http://files.avvstaffarea.com/uploads/1/3/0/7/130740053/wuvavapedon_mofedojunuv.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/jafavamakoravugeginutis.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/binary_search_tree_c.pdf
    • https://cdn.shopify.com/s/files/1/0436/9504/6824/files/vujibi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7278/1478/files/contrastive_analysis_james.pdf
    • https://cdn.shopify.com/s/files/1/0433/3466/4347/files/larananiwonezasagopakeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/8763/4338/files/ode_to_a_nightingale_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/jelefaxapafo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2571/0756/files/74499535628.pdf
    • https://cdn.shopify.com/s/files/1/0432/0519/7985/files/baximizajis.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_off0000463d.bin
c6768432600e4aeb63ead697475967ce37f22dda3e16259476c9d66ab926309b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x463D 5456 bytes
font_01_sfnt_off000058c4.bin
3633466e76e4f224acf04c7b9e49fa0e2d18c96e338893dae0d8ef89fe12fe5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58C4 9704 bytes
font_02_sfnt_off000079f7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F7 4324 bytes

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