Malicious PDF — malware analysis report

Static analysis result for SHA-256 a281c7517b94163c…

MALICIOUS

PDF

41.3 KB Created: 2020-09-01 06:21:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 853e2977f43c573669cf74ee0e306839 SHA-1: 98b06b495663416c6bc255b439a078c99490d955 SHA-256: a281c7517b94163c3b674ad2cd37d7ae8c88a1f93f7a1f9917912e1d982ed119
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to the presence of a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, pointing to 'https://ttraff.com/wix?keyword=android+version+huawei+p9+lite'. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of embedded links, with 'https://static.usrfiles.com/ugd/e6092c_356ed2ac513a46d8a9561cbdbecfaaef.pdf' being the first in the list. These findings suggest the document is designed to lure users into clicking malicious links, likely for phishing or malware delivery.

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.com/wix?keyword=android+version+huawei+p9+lite
    • https://static.usrfiles.com/ugd/e6092c_356ed2ac513a46d8a9561cbdbecfaaef.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_bf3aa0ac1d2f49a6aec7c2b16d4b7fb4.pdf
    • https://static.usrfiles.com/ugd/b8c837_59741b8299504c5c87716a449b6ee350.pdf
    • https://static.usrfiles.com/ugd/5de1df_3c81a84129574004835e0a4303a5e161.pdf
    • https://cdn.shopify.com/s/files/1/0437/7637/6983/files/93126356750.pdf
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/hauger_golfklubb_baneguide.pdf
    • https://cdn.shopify.com/s/files/1/0435/0715/5110/files/calling_the_shots_why_parents_reject_vaccines.pdf
    • https://static.usrfiles.com/ugd/f63f29_ab7ed93de6d248bc90e20196c2398261.pdf
    • https://static.usrfiles.com/ugd/2ca22b_827523fa774a426f87048188e27df647.pdf
    • https://static.usrfiles.com/ugd/21a131_321ac6533bb0427b8c44660f8b8251a4.pdf
    • https://static.usrfiles.com/ugd/b8c837_bbd088194cfe4ad09ad27efdbf6862d1.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_bfa6d5f1bdde4aa2b7db38e166684863.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8944/files/57780801983.pdf
    • https://cdn.shopify.com/s/files/1/0435/1157/8776/files/24453107488.pdf
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/vawefoguvimazebojejup.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_off00006370.bin
722548d0818f17feffcdbc26dd52124f259b9c1c00aa9a348aef2a820031747c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6370 5344 bytes
font_01_sfnt_off000075ae.bin
de5759a70bf918a3d54923e083ded44c849ddc1be9f7e0fec976384a4990accd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75AE 10128 bytes

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