Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6182c01e0047609…

MALICIOUS

PDF

48.2 KB Created: 2020-08-09 02:59:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d831f089af9134630befde1b98808233 SHA-1: 0769384ce3ae57403dad43841a73b5b8d21ada06 SHA-256: b6182c01e0047609b0f47ec7c1d504e6754894f96ab41b0653949db85facb97a
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=musculos+agonistas+y+antagonistas+del+hombro+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on cdn.shopify.com. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector URL is a strong indicator of a phishing or redirection attack.

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.cc/pify?keyword=musculos+agonistas+y+antagonistas+del+hombro+pdf
    • http://files.albertawinds.ca/uploads/1/3/0/8/130874379/5006072.pdf
    • http://files.highpoint12.com/uploads/1/3/1/4/131453990/bf5284071.pdf
    • http://files.letscodeon.org/uploads/1/3/1/6/131606261/vadit.pdf
    • http://files.mitsuhiro-ikeda.com/uploads/1/3/0/9/130969761/f88e9e1ff5af.pdf
    • https://cdn.shopify.com/s/files/1/0437/6304/0408/files/a_clockwork_orange_script.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/google_colab_gpu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/33956363048.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/9431253107.pdf
    • https://cdn.shopify.com/s/files/1/0437/3463/0549/files/12575443161.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/tirofibadovopidutitewod.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/215895252.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7261/files/99569940429.pdf
    • https://cdn.shopify.com/s/files/1/0437/8614/1847/files/design_and_analysis_of_algorithm_notes_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/7966/3765/files/14731154302.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/titomobedisiguke.pdf
    • https://cdn.shopify.com/s/files/1/0429/7746/0383/files/engineering_economy_sullivan.pdf
    • https://cdn.shopify.com/s/files/1/0440/1951/5557/files/geralidoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/49874479159.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_off000063d4.bin
8a39c04e80e1853abc3c9c72c4806101b152d5974b993dcdeebefea2f2ed2fa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D4 5816 bytes
font_01_sfnt_off00007788.bin
27326a84bbf572835cead0d1a855f8f4a4351b43d8364b7e8864a191c7b3d286		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7788 11256 bytes
font_02_sfnt_off00009c4c.bin
dd176a707b38e2d14cf574a6160cd909198b34e10d42a5334d7f565d2b05970e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C4C 16076 bytes

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