Malicious PDF — malware analysis report

Static analysis result for SHA-256 259611dcacdf7c95…

MALICIOUS

PDF

58.2 KB Created: 2020-09-02 07:16:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbf4005de4226e9d25572ca555bc8ff5 SHA-1: 87125343ed74a226ab240dd9c1e3e6c76f148739 SHA-256: 259611dcacdf7c95c356ab7d71bc53da645f2d81bb7d8db789a569c7f8d28685
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including one pointing to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, appears to contain text related to political platforms, likely serving as a lure. The presence of a link farm and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful content.

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.ru/wix?keyword=bloc+quebecois+party+of+canada+platform+2019
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/87260298061.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2332/files/bathymetry_survey.pdf
    • https://cdn.shopify.com/s/files/1/0434/4433/8838/files/rebawenubutuwokiwi.pdf
    • https://static.usrfiles.com/ugd/9219f8_ff39a32f18ed42fd9ec94293f52e68e5.pdf
    • https://static.usrfiles.com/ugd/97368a_7d6e24f7bfe34721ae85ff7e87cb73bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22cdb9f5e104815a60ba5cfedbbd167.pdf
    • https://static.usrfiles.com/ugd/dc6899_5338edaff4a946188cf01c2e05ff5b4a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b0aabbc553d042b99877955f06c725cc.pdf
    • https://static.usrfiles.com/ugd/b6bf5b_24ae5cde79c74385925b89813cf8bb24.pdf
    • https://static.usrfiles.com/ugd/79e0dc_dfbfbe3c4b7146de9b0d4433da24e20c.pdf
    • https://static.usrfiles.com/ugd/493135_bde8d85c5bb04f6db817b3829a0cd74f.pdf
    • https://static.usrfiles.com/ugd/7f16bd_f2277d1f06714784a3cc5092e93f7b77.pdf
    • https://static.usrfiles.com/ugd/cc089a_07b41ed19d8c49a887737375b8fe4983.pdf
    • https://cdn.shopify.com/s/files/1/0437/4603/3818/files/77869433798.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/the_balawat_gates_of_ashurnasirpal_ii.pdf
    • https://cdn.shopify.com/s/files/1/0439/1282/2939/files/cartas_para_mi_mejor_amiga_manualidades.pdf
    • https://cdn.shopify.com/s/files/1/0435/2868/3672/files/cub_scout_wolf_handbook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/3712/9895/files/pediatric_acute_respiratory_distress_syndrome.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_off00009456.bin
6edb0240a902e600e5469ae1f4c23f5a96ae26387567d3dbc89864df48164fc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9456 6080 bytes
font_01_sfnt_off0000a8ee.bin
d422d8c4a838e0b312546e547b39a35d22eb12f1578e08f1c63c4702a815dadd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8EE 10652 bytes
font_02_sfnt_off0000cd22.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD22 4324 bytes

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