Malicious PDF — malware analysis report

Static analysis result for SHA-256 9004059908a8c4c3…

MALICIOUS

PDF

60.6 KB Created: 2020-08-22 00:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b410a7addbde75ccbbb6d8894d6177ba SHA-1: f51461189a13472656baa3ff03e8585e810763ca SHA-256: 9004059908a8c4c3f20340244778b1ebe3c3a6cf731ccdbcdf334f7be1369e02
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'adding unlike fractions' and the URL 'https://ttraff.ru/pify?keyword=adding+unlike+fractions+common+core+worksheets', suggesting a lure to a malicious site. The ML classifier also flagged this PDF with high confidence.

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.ru/pify?keyword=adding+unlike+fractions+common+core+worksheets
    • http://files.tinytownllc.com/uploads/1/3/1/4/131437471/9208199.pdf
    • http://files.copewithcancer.net/uploads/1/3/1/3/131384071/dowubazowid_lorovul_tefopatekunurov.pdf
    • https://cdn.shopify.com/s/files/1/0434/7074/9856/files/52636013623.pdf
    • https://cdn.shopify.com/s/files/1/0437/6900/4190/files/meri_bhavna_jain_bhajan_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/2204/0731/files/off_balance_sheet_liabilities_example.pdf
    • https://cdn.shopify.com/s/files/1/0432/7168/4252/files/54547863905.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1978/files/pejujodidewopiduwajebi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1938/6526/files/84959170188.pdf
    • https://cdn.shopify.com/s/files/1/0430/5272/8474/files/pasabulubaza.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/top_100_songs_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0433/8493/0462/files/chrome_tabs_query.pdf
    • https://cdn.shopify.com/s/files/1/0445/8476/3556/files/parliamentary_and_presidential_form_of_government.pdf
    • https://cdn.shopify.com/s/files/1/0435/2478/4292/files/16188477788.pdf
    • https://cdn.shopify.com/s/files/1/0431/1787/1255/files/afk_arena_team_building_guide.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/
    • https://cdn.shopify.com/s/files/1/0437/6900

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009a15.bin
685a39be3f5f0fda903982272766a4305543c1e9dc8f51c3ca5a27dd37772a8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A15 5580 bytes
font_01_sfnt_off0000acf0.bin
fe520d61b739392d85b93fe9d9f5311e3d8d46c277da18dcde93b6873e0de3df
pdf-font-stream PDF embedded font (sfnt) at offset 0xACF0 10100 bytes
font_02_sfnt_off0000cfb6.bin
64e13322576ebe4b9a20b8efdba1cb2c8bc01163a7c4e1ba1f667a2d7cf8e6df
pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB6 16116 bytes