Malicious PDF — malware analysis report

Static analysis result for SHA-256 f914b1b1f24dddcf…

MALICIOUS

PDF

41.4 KB Created: 2020-08-06 06:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5508386b4cbf202fe99ea7521ae63bbe SHA-1: 5efdd2c5770b6ad87bad953521a0b3287a5d7538 SHA-256: f914b1b1f24dddcfcf6a99be2bb4c0934d55cb9d40b7d276d3cd2d04bf885af6
120 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 'https://ttraff.ru/wb?keyword=manhattan%20gmat%20quant%20pdf%20free%20download'. Additionally, it exhibits a PDF link farm behavior, with numerous links to PDFs hosted on cdn.shopify.com, one of which is 'https://cdn.shopify.com/s/files/1/0438/5511/8501/files/genolukibuwagurifawem.pdf'. The document body text also contains the malicious URL, reinforcing the lure for users to download content.

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/wb?keyword=manhattan%20gmat%20quant%20pdf%20free%20download
    • http://kugodev.greatautismresources.com/uploads/1/3/0/8/130873995/5508124.pdf
    • http://files.lake-kabetogama.com/uploads/1/3/1/3/131383943/4200455.pdf
    • http://files.shannonlegrand.com/uploads/1/3/1/4/131407357/7080044.pdf
    • https://cdn.shopify.com/s/files/1/0438/5511/8501/files/genolukibuwagurifawem.pdf
    • https://cdn.shopify.com/s/files/1/0437/4573/8903/files/youtube_to_mp3_unblocked.pdf
    • https://cdn.shopify.com/s/files/1/0430/0560/8099/files/xxl_freshman_2014.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0430/3365/7507/files/mozipijeguzoxosokirixali.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/self_attention_generative_adversarial_networks.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/29782661857.pdf
    • https://cdn.shopify.com/s/files/1/0429/9633/4753/files/76855434346.pdf
    • https://cdn.shopify.com/s/files/1/0433/5806/0703/files/rise_to_ruins_cheat_table.pdf
    • https://cdn.shopify.com/s/files/1/0429/3335/4663/files/56731089602.pdf
    • https://cdn.shopify.com/s/files/1/0433/7503/4520/files/lojilejol.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_off000054be.bin
e9a6150feb2a4b7112fba52b422078a0202883cb31f0442507fbc32614207c1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54BE 5500 bytes
font_01_sfnt_off00006763.bin
064044a78b8a5c754864ac02008fd4db3e4d7bb7b6078079d7ae538f6cf04e84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6763 21916 bytes

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