Malicious PDF — malware analysis report

Static analysis result for SHA-256 1adf4aedb31020af…

MALICIOUS

PDF

48.0 KB Created: 2020-08-21 18:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4284c1d179e25824ee2dce7f34c54e81 SHA-1: f21ff9d4d90fb57faec6f0454c64ceb1d638dd44 SHA-256: 1adf4aedb31020afa0d7399b22470ecfeebbc4b2f1f6b34357599b529d722135
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'free brain games apps for android' and the malicious URL. This suggests a social engineering tactic to trick users into clicking the link, which then likely redirects to malicious content. The PDF also contains a large number of external links, indicating a link farm strategy.

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.com/pify?keyword=free+brain+games+apps+for+android
    • http://nabetu.inspirationstudiosgallery.com/uploads/1/3/1/4/131453293/ca28d2c61c43.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/94192809194.pdf
    • https://cdn.shopify.com/s/files/1/0440/6840/5413/files/jofololejunotamisav.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/strategic_marketing_plan_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/6686/7362/files/simple_present_tense_affirmative_negative_interrogative_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/85861199606.pdf
    • https://cdn.shopify.com/s/files/1/0440/7279/6310/files/31230583375.pdf
    • https://cdn.shopify.com/s/files/1/0435/4539/5359/files/black_s_law_dictionary_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/44353103858.pdf
    • https://cdn.shopify.com/s/files/1/0431/5922/4480/files/lelomiworevukubonij.pdf
    • https://cdn.shopify.com/s/files/1/0439/9949/4302/files/cbse_maths_textbook_for_class_10.pdf
    • https://cdn.shopify.com/s/files/1/0433/2594/8072/files/gebawavopepib.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_off00007dfa.bin
670a4520fcf8b262b28322549daeed6fcfb873ccc3251d32947c9e4c5dc6a4dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 5424 bytes
font_01_sfnt_off00009049.bin
543b84b841880758c5b34b16cd01aca8d5c4bf45b5cdb7266b1e7587adc9736f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9049 10132 bytes

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