Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56cebbc345a493d…

MALICIOUS

PDF

74.5 KB Created: 2020-09-09 12:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0474905be8ce6cc9698a4670c6124260 SHA-1: 1e51a61d04bfe6cd44a67b4bf4c1ce81019ed3e4 SHA-256: e56cebbc345a493d3aac247269131d5500d653fc824b68eab94243bae12022d2
150 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.club/wix?keyword=script+hack+wifi+via+termux'. This URL is presented within the document's body, suggesting an attempt to trick the user into clicking it. The presence of a large number of external links, many pointing to 'static.usrfiles.com', indicates a link farm strategy, likely to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.club/wix?keyword=script+hack+wifi+via+termux
    • https://static.usrfiles.com/ugd/ddb60a_be1745a408ff41dd916d87bb0637f3a3.pdf
    • https://static.usrfiles.com/ugd/345929_9a698d79c7be46fd92b2159c6b3dd83d.pdf
    • https://static.usrfiles.com/ugd/9b33c5_81b541c82b2b44d79d9b01bd8c3275df.pdf
    • https://static.usrfiles.com/ugd/3b5dd9_b0e8b6676ab941c99acfa5346180e6c0.pdf
    • https://static.usrfiles.com/ugd/913720_6081559955bb44498ce933f2f2d6dd9f.pdf
    • https://cdn.shopify.com/s/files/1/0435/9385/9231/files/booty_farm_hacked_apk.pdf
    • https://cdn.shopify.com/s/files/1/0436/7751/5929/files/rezugepozuxinigexixexutob.pdf
    • https://cdn.shopify.com/s/files/1/0466/2404/7269/files/malcolm_baldrige_performance_excellence_framework.pdf
    • https://cdn.shopify.com/s/files/1/0434/3762/1404/files/90866942469.pdf
    • https://cdn.shopify.com/s/files/1/0429/7529/7689/files/buzanovex.pdf
    • https://cdn.shopify.com/s/files/1/0430/1812/5465/files/7024972253.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/55715745582.pdf
    • https://static.usrfiles.com/ugd/269bb8_51f638d5f79b463c920ed64b646ad2d4.pdf
    • https://static.usrfiles.com/ugd/fdee49_1d46bdd8ff1d4f25bfa043511f826c3c.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af7f.bin
a488cded474c324de0da198211c40b2d43207a3a64af6d5023c89c4dee03d173
pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7F 5432 bytes
font_01_sfnt_off0000c1ed.bin
d2830d2aa1515c631152642dc20d563fa7da645c873b25d02e4b8f96006f68b6
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1ED 8536 bytes
font_02_sfnt_off0000dec4.bin
3ffabba2c1460a8a5e04e3eff3d8a90765e502059232935304256c6e872de2aa
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC4 11392 bytes
font_03_sfnt_off0001046d.bin
7bff5e2c4431fb453a305c9d3e2eccb8d4e85fe5ee4f42ced992e626bc925d70
pdf-font-stream PDF embedded font (sfnt) at offset 0x1046D 16752 bytes