Malicious PDF — malware analysis report

Static analysis result for SHA-256 930b6189c6c2a677…

MALICIOUS

PDF

45.9 KB Created: 2020-09-01 03:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7431126dde7acbef2012e7fd4e05bcc6 SHA-1: 97ccdb0df683935decc37f5627bea89f7951645e SHA-256: 930b6189c6c2a6775d0680c8b8b814d5c0ca6d7acdcf90d979519c564866a885
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The document body, though heavily obfuscated, also contains the same URL. This suggests the primary purpose is to redirect the user to a malicious site, likely for phishing or malware delivery. The presence of numerous other PDF links points to a link farm strategy, potentially for SEO manipulation or to obscure the malicious destination.

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=china+gate+songs+ming
    • https://static.usrfiles.com/ugd/cafc24_8e32c2f098dd48cabfb8684c1d9ef7ea.pdf
    • https://static.usrfiles.com/ugd/b910ae_84ac3c898eeb4a93b1c88a5b48b7788a.pdf
    • https://static.usrfiles.com/ugd/bf0735_0475eba96e374267ac01856a22999264.pdf
    • https://static.usrfiles.com/ugd/b8c837_53e8f6c744ad4c91b07e0a08e93016c5.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/alternative_assessment_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/manazokat.pdf
    • https://cdn.shopify.com/s/files/1/0437/1018/5621/files/neural_networks_and_back_propagation_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0439/2153/9240/files/st_augustine_of_hippo_confessions.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/genero_lirico_y_sus_subgeneros.pdf
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/zewanobalimalibamat.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/90696669780.pdf
    • https://cdn.shopify.com/s/files/1/0434/4581/3414/files/root_mean_square_error_formula.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/ruvimak.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_off00006015.bin
c4a99bcc9b77a147c943d72817a8726a3b16a2e5d95211a126a4521ae116965a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6015 4876 bytes
font_01_sfnt_off00007088.bin
76e57c790c80fc25824e9585c43a6af0b6373c7f4d7c30726a72856beacefb9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7088 10760 bytes
font_02_sfnt_off00009589.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9589 16164 bytes

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