Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0daeb91c7e9f48…

MALICIOUS

PDF

45.4 KB Created: 2020-08-03 14:21:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb8485e6a3c6f5bfcddf7452510732bc SHA-1: a13d70cbab2120297f1b96658df52c462dbbc25b SHA-256: ee0daeb91c7e9f489f1f246343f4bce0dc02d1be62dff9d8d7ac7fcf28e2669e
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The primary URL, 'https://ttraff.cc/pify?keyword=como+beber+agua+de+mar+pdf', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other Shopify-hosted PDF links, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

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=como+beber+agua+de+mar+pdf
    • http://files.adjuvotechnology.com/uploads/1/3/2/7/132712530/xunubirumapog.pdf
    • http://files.stormh20bmp.com/uploads/1/3/0/7/130776619/jitesotarivoz_nibagiloxotip.pdf
    • http://files.littlewordybird.com/uploads/1/3/1/8/131872149/jubogivetujoze.pdf
    • http://files.greeceneedslove.com/uploads/1/3/1/8/131856162/wenagibetowatijok.pdf
    • http://files.braverthanthewaves.com/uploads/1/3/1/4/131453807/5359755.pdf
    • https://cdn.shopify.com/s/files/1/0432/6188/6627/files/piner.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/zenugurut.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/gufaruser.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/japoxotoruzub.pdf
    • https://cdn.shopify.com/s/files/1/0433/3197/7370/files/31796710621.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/78022928311.pdf
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/wadogupowevesefowapelimab.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6160/files/jujolixedemexatilutetar.pdf
    • https://cdn.shopify.com/s/files/1/0435/8956/6623/files/24120209140.pdf
    • https://cdn.shopify.com/s/files/1/0437/8358/5949/files/mijunavujiwusi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4191/4006/files/tusesadotipede.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2908/files/22133817816.pdf
    • https://cdn.shopify.com/s/files/1/0434/8605/2504/files/lifim.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007067.bin
2c517607103608485acc4243390a327ed3ce206ba9f84c015aea4c4c0fcd909a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7067 5196 bytes
font_01_sfnt_off000081f1.bin
a593328c9cfd9f1d1ecaf310eaa1d3bf8315ed49f098940f9fcaff26a9d0dd64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81F1 11472 bytes

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