Malicious PDF — malware analysis report

Static analysis result for SHA-256 0503f0bbe03cc22d…

MALICIOUS

PDF

41.9 KB Created: 2020-09-04 00:32:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07646b24b4ec6a45acf546e0641f942 SHA-1: 59b7df495b4c4564f4bf47a3f66dac3110687286 SHA-256: 0503f0bbe03cc22d21b559971cfd1b18499c9080739cbf60fe34f840cc4969e5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a known malicious redirector at `ttraff.com`. The ML classifier strongly indicated maliciousness, and the presence of many external links suggests a link farm or a mechanism to distribute further malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

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=template+felt+baby+shoes
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/9779/2420/files/wutugejatazuvasamus.pdf
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/92813913149.pdf
    • https://cdn.shopify.com/s/files/1/0457/3167/6326/files/weekly_employee_schedule_template_google_docs.pdf
    • https://cdn.shopify.com/s/files/1/0463/4473/2833/files/16443480641.pdf
    • https://cdn.shopify.com/s/files/1/0437/4927/7845/files/nuwidodedibopojubu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/latest_chromedriver_for_linux.pdf
    • https://cdn.shopify.com/s/files/1/0431/8684/7905/files/chiltern_hills_academy_learning_platform.pdf
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/xifodabeposi.pdf
    • https://static.usrfiles.com/ugd/a91264_a8781844760b41f5974f346822b79a3b.pdf
    • https://static.usrfiles.com/ugd/843280_62a6cc5e5d32441db9b615ec2f34f7a4.pdf
    • https://static.usrfiles.com/ugd/0df15e_2d98b1a633ab47febd8de3a584edd8d3.pdf
    • https://static.usrfiles.com/ugd/16879a_3a1055f3a4894e76b152598cb09da3a4.pdf
    • https://static.usrfiles.com/ugd/7cefa9_de10c80f50164fbe8b885eb997b41106.pdf
    • https://static.usrfiles.com/ugd/2486b5_b19b78c245584d67a915e724ebb8a094.pdf
    • https://static.usrfiles.com/ugd/affb4a_08852079e5544165a8c9c828cd38cc12.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_off0000671c.bin
405fda8e10672b4125ece1b625ed917a8201bd34fc6c9ffb75863a90d408f066
pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 5236 bytes
font_01_sfnt_off000078ce.bin
8ce3239d3ee3cbbb10dfef4aa5a694957a2a60e5bc396e8db245e633575dbb0c
pdf-font-stream PDF embedded font (sfnt) at offset 0x78CE 9884 bytes