Malicious PDF — malware analysis report

Static analysis result for SHA-256 b08d80b757f1b32a…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 18:01:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8695e6fb7a8bc52e88eb6d522a58a5f SHA-1: 6bc3dc98f9983804ca0b7e69a28e51ad2bc9e32c SHA-256: b08d80b757f1b32aab86c7d4a8aaeda8f69c6c3b801d27aad7d9762760e2ef11
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of embedded links, many of which point to a redirector. The document body contains text related to 'Hp gas dcms report' and includes the URL https://ttraff.com/wix?keyword=hp+gas+dcms+report, which is identified as a malicious redirector. The presence of numerous links to static.usrfiles.com suggests a link farm for SEO manipulation or to obscure the final malicious destination.

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=hp+gas+dcms+report
    • https://static.usrfiles.com/ugd/b8c837_498797f69b75420b9030a21ffcf375ea.pdf
    • https://static.usrfiles.com/ugd/f1780b_57165bd3522840068dcdd718c3110c8f.pdf
    • https://static.usrfiles.com/ugd/b8c837_74d288e799504b99958d9226f29c1549.pdf
    • https://static.usrfiles.com/ugd/80bfa9_85c9ba9e99ef4192a3c7891619dac8d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bfb702965b1477b80a3483ce8996ab9.pdf
    • https://static.usrfiles.com/ugd/66c878_7f751180020045dc817a3de4f0f87fd0.pdf
    • https://static.usrfiles.com/ugd/b8c837_a11de11dcac94997b71c16250d4e173c.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b1e7c6323bf4b9a92f753438ff76aec.pdf
    • https://cdn.shopify.com/s/files/1/0431/0623/8613/files/burn_baby_burn_meg_medina.pdf
    • https://cdn.shopify.com/s/files/1/0431/6463/1189/files/wezidaximagobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5529/2317/files/jifitunowujopuxenojapo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/govabupukejeb.pdf
    • https://cdn.shopify.com/s/files/1/0435/0119/1328/files/21316219983.pdf
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/apache_tomcat_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/aiou_ba_admission_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/5071/9642/files/injury_incident_report.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_off0000474b.bin
2962676fdc195bd122a71cca51ead959bc1aa6e4a1dce4188655d110b93f2806		 pdf-font-stream PDF embedded font (sfnt) at offset 0x474B 5324 bytes
font_01_sfnt_off00005944.bin
dce45f172ad13131455e22946b4fd4085846ed96dfd9579f1e36cbe5ea4984d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5944 9640 bytes
font_02_sfnt_off00007a80.bin
f478f1d2757e853e024139479b5c374008f89de43ed37e4da680e7991dc98102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A80 17380 bytes

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