Malicious PDF — malware analysis report

Static analysis result for SHA-256 531fb2400890ac11…

MALICIOUS

PDF

41.2 KB Created: 2020-08-25 04:26:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62659c287e0bd4d78b0d9fd453f3f2ff SHA-1: c93be3edec3f9226456cf54402f30c5c92888fae SHA-256: 531fb2400890ac117c18a53e478776a62d90dd4cedf8b05ea942ebc6335175ab
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 ttraff.ru. This URL is embedded within the document body, disguised as a 'Chinese dragon mask template'. The document also contains a large number of external PDF links, many hosted on Shopify, which is flagged as a PDF link farm. The primary malicious URL is the redirector, which likely leads to a further stage of infection.

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/pify?keyword=chinese+dragon+mask+template
    • http://zijagoda.lafesmith.com/uploads/1/3/2/6/132695492/pivivaju.pdf
    • http://files.choskomusic.com/uploads/1/3/0/9/130969712/2f1ff9e4d.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8327/files/32503405828.pdf
    • https://cdn.shopify.com/s/files/1/0439/5089/9368/files/8747488431.pdf
    • https://cdn.shopify.com/s/files/1/0432/7748/4196/files/norwich_bulletin_obituaries_today.pdf
    • https://cdn.shopify.com/s/files/1/0437/1903/2987/files/mary_j_blidge_be_without_you_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0434/3994/7932/files/tusoma.pdf
    • https://cdn.shopify.com/s/files/1/0435/2675/0357/files/lurirajaliloligegoguk.pdf
    • https://cdn.shopify.com/s/files/1/0431/9831/6707/files/25770058645.pdf
    • https://cdn.shopify.com/s/files/1/0435/5915/7921/files/28533468319.pdf
    • https://cdn.shopify.com/s/files/1/0430/6976/7842/files/24563429915.pdf
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/seraga.pdf
    • https://cdn.shopify.com/s/files/1/0437/6887/3112/files/wegofoxogoduku.pdf
    • https://cdn.shopify.com/s/files/1/0439/3048/4904/files/7493144547.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/55463867010.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_off000061e5.bin
0abec0ad4246e2cf2480ad111e5f2b1128113624ab26a69429cfbd33d97716db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E5 5340 bytes
font_01_sfnt_off000073d7.bin
328074a73622f04076acfa925c0cd6c0d0e8c2536131b8c1a5b70566869913e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73D7 10820 bytes

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