Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b9074b0cf242da…

MALICIOUS

PDF

43.3 KB Created: 2020-08-24 16:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 034f7ca51e80a5a1c86d0a8ad868c7fb SHA-1: 190745d15569a777c31d63f2d486c5d11e95cd97 SHA-256: e9b9074b0cf242da54cc3fabe9656712dba4830b51b0d53d17b341e79c41e6d0
150 Risk Score

Malware Insights

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

The PDF file was flagged for containing a large number of external links, a common technique for distributing malicious content. One of the embedded URLs, https://ttraff.cc/pify?keyword=android+colorstatelist+code, is identified as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is a primary lure. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=android+colorstatelist+code
    • http://fizep.cfkayakrace.com/uploads/1/3/2/6/132682790/pukekixi_fipajo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5764/files/69213821207.pdf
    • https://cdn.shopify.com/s/files/1/0440/6912/6309/files/3425356510.pdf
    • https://cdn.shopify.com/s/files/1/0431/4592/0669/files/a_textbook_of_bryophytes_pteridophytes_gymnosperms_and_paleobotany.pdf
    • https://cdn.shopify.com/s/files/1/0462/3925/2631/files/nivovaru.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5241/files/16222556389.pdf
    • https://cdn.shopify.com/s/files/1/0439/5502/8126/files/pdf_file_reducer_100_kb.pdf
    • https://cdn.shopify.com/s/files/1/0429/2653/8911/files/free_android_ad_blocker_apk.pdf
    • https://cdn.shopify.com/s/files/1/0435/5345/6289/files/bsc_1st_year_physics_syllabus.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_off00005ecd.bin
bf702313511d4efd594c51538e039132729774ee26de86162f1767f12f0ecc7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECD 4712 bytes
font_01_sfnt_off00006ec2.bin
b997bd928d45d0d44da75e5143962a06b211d3a0e6c1bcdf17cac93378934c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC2 10548 bytes
font_02_sfnt_off000092d4.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92D4 4324 bytes

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