Malicious PDF — malware analysis report

Static analysis result for SHA-256 03897a92f489d71c…

MALICIOUS

PDF

48.3 KB Created: 2020-08-30 15:02:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f4d63e5ec3e904304e63196400f13291 SHA-1: 0d8af822243a7f658e0e539936f99c69b3da0991 SHA-256: 03897a92f489d71cc2f488bc11ffc3e4dbeb13684874d50ba051df1726b18bd2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with one heuristic specifically identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the malicious URL. This suggests the primary purpose of the PDF is to act as a lure, directing users to malicious sites.

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/wix?keyword=xcom+2+long+war+of+the+chosen
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/3e5d97_d16543d6e1d84550b9825dcaf1a8222f.pdf
    • https://static.usrfiles.com/ugd/b28561_b7652c8c081a49d194ee46ab98934fac.pdf
    • https://static.usrfiles.com/ugd/6846fe_0ac02bb48cb4476aac7afa0a2ebf1c5d.pdf
    • https://static.usrfiles.com/ugd/b8c837_958296bf50a54ab59f4d998d3d98c7f3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xanixiki.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/i_love_you_flower_images.pdf
    • https://cdn.shopify.com/s/files/1/0435/6423/6968/files/vokanofufapexiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/4973/8650/files/fezofafidenibijuwiger.pdf
    • https://static.usrfiles.com/ugd/6116da_c32a8ef3ac9b4762b16e3dd6d1f25949.pdf
    • https://static.usrfiles.com/ugd/a1fb72_315915015fc54fae920be10dc60461b4.pdf
    • https://static.usrfiles.com/ugd/e5a943_5635e964dcce42449f7fd1466a743274.pdf
    • https://static.usrfiles.com/ugd/89c6ad_6014c7d54e0d4eaa92da0f144d631c88.pdf
    • https://static.usrfiles.com/ugd/451461_9ca2d861cf294b9ba4c6a69fd10a22dd.pdf
    • https://static.usrfiles.com/ugd/c7ef1a_c54aa29cb34748cca66d1328a6731d58.pdf
    • https://static.usrfiles.com/ugd/05900a_3bfdb34efb1c4e4e99a32b1b63c8b70a.pdf
    • https://static.usrfiles.com/ugd/b8c837_de70664321e94bd5ae1b2183916fa764.pdf
    • https://static.usrfiles.com/ugd/2486b5_145fe478a4464af0bcf1ee0d1407eeb0.pdf
    • https://static.usrfiles.com/ugd/2813e2_94b9d2be7983454c924d04bea102db26.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007dfe.bin
32f5b00f82ea700785749bd65727d1a540753416f1064d68960d590b4dc8b3c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFE 5496 bytes
font_01_sfnt_off0000908e.bin
0e1ac7e6bb4b6e0820972f3fef23e6a10ce8922f6dba9d21cd3774189e6c74a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908E 10356 bytes

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