Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab28f669b0623c6…

MALICIOUS

PDF

53.2 KB Created: 2020-09-01 02:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9ecefd91e530d4e867ea311e1389aed SHA-1: 6304f3d041f5787c3604817aa47551be54e92786 SHA-256: cab28f669b0623c63296ec828b3cca15275c6800ea09785e00f124d1a386d4a4
154 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 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Cigna brca testing guidelines' and the malicious URL, suggesting a phishing lure. The presence of numerous Shopify links, while mostly benign, indicates a potential attempt to blend malicious content with legitimate-looking resources. No scripts were extracted from this sample.

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.com/wix?keyword=cigna+brca+testing+guidelines
    • https://cdn.shopify.com/s/files/1/0446/0979/8307/files/cache_cleaner_pro_apk_4._0._0.pdf
    • https://cdn.shopify.com/s/files/1/0436/3000/2336/files/nutanoxopiwodadimivuf.pdf
    • https://cdn.shopify.com/s/files/1/0438/6524/3803/files/nomekosumovisumabok.pdf
    • https://cdn.shopify.com/s/files/1/0430/4224/2709/files/ravelilifipimup.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3253/files/metabolismo_y_crecimiento_bacteriano.pdf
    • https://cdn.shopify.com/s/files/1/0432/0742/6216/files/19943023705.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/33922420666.pdf
    • https://cdn.shopify.com/s/files/1/0430/2074/6906/files/road_safety_awareness_programme_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/38904452057.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdf
    • https://cdn.shopify.com/s/files/1/0434/0659/0106/files/46094684455.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://static.usrfiles.com/ugd/6924eb_b17b3032f5584de396d0e9141312a855.pdf
    • https://static.usrfiles.com/ugd/cec570_62097015c2964ea788d543493d3d439a.pdf
    • https://static.usrfiles.com/ugd/83b1b3_dc5d21e5088043b6a996e85a70d773b6.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_off0000859f.bin
d39c9e6524d63d69acd2c96ef4274072e2213fe76115ebb4b1f68645c63be489		 pdf-font-stream PDF embedded font (sfnt) at offset 0x859F 5044 bytes
font_01_sfnt_off000096c8.bin
764e6dc169c08a2a7359ff729d5b1c4b167dcecbc986d11b686157db41e86469		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96C8 10420 bytes
font_02_sfnt_off0000ba04.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA04 4324 bytes

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