Malicious PDF — malware analysis report

Static analysis result for SHA-256 8254aff2422ab2b5…

MALICIOUS

PDF

48.0 KB Created: 2020-08-22 15:41:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e09750796da836936b4ba9ede6b88a4b SHA-1: 4e24ad85d7ddb2d8454e1b72b32cdf2cc5d66a6d SHA-256: 8254aff2422ab2b5e80d77042a99a72a116d3679661573b9bbef910fa8a0107b
130 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically identified as a malicious redirector pointing to a URL containing 'pixel%2527+s+unknown+battle+ground+apk'. This, combined with the 'SE_DOWNLOAD_BUTTON' heuristic, indicates a lure to download a potentially malicious application. The document body, though heavily obfuscated, also contains the malicious URL, reinforcing the attack pattern.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=pixel%2527+s+unknown+battle+ground+apk
    • http://files.flawlessfrenchies.com/uploads/1/3/1/4/131482826/ad44ddf4.pdf
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/49344788900.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/700w_audio_amplifier_circuit_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0434/0678/6725/files/good_cheap_tablet_for_readings.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/32000385348.pdf
    • https://cdn.shopify.com/s/files/1/0437/8525/7112/files/burda_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/vuxexuvelafidixekasapenad.pdf
    • https://cdn.shopify.com/s/files/1/0449/9308/5598/files/kubuzo.pdf
    • https://cdn.shopify.com/s/files/1/0434/4738/6264/files/35328332366.pdf
    • https://cdn.shopify.com/s/files/1/0435/5057/2695/files/imperatives_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/7125/8278/files/i_can_t_hear_anyone_in_discord.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_off000066e4.bin
81bbb5bc3a1ade30b0ef23a6f6dc4256f87215e89e0b2ae8a327c3b2331c450c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66E4 5528 bytes
font_01_sfnt_off000079d1.bin
5499f2e643389f3f407ee2fb937cc358a42c5bfc2a05d0c2c7717f655325b70f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D1 10420 bytes
font_02_sfnt_off00009db3.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB3 16204 bytes

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