Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec55c0e4e82e8942…

MALICIOUS

PDF

57.1 KB Created: 2020-07-25 20:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75b8ac9b1911079cd5c94eba85a2abbd SHA-1: db35f41a29430e76ed18909b366f944b10ffeac5 SHA-256: ec55c0e4e82e8942ddd53b7be5505cf0b251a71f0e1a1138b9642479d8b867c3
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits a PDF SEO link farm, with numerous links pointing to Shopify-hosted PDFs. The document body is heavily obfuscated, but the presence of these links suggests a malicious intent to lure users to external, potentially harmful, content. The primary attack pattern involves redirecting users through a chain of links, likely for phishing or malware delivery.

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=euro+symbol+android+keyboard
    • http://files.berendesteam.com/uploads/1/3/1/1/131164572/lapote_gazob_renobon_gugariweg.pdf
    • http://files.yourcreativechord.com/uploads/1/3/1/1/131164398/65024b131866.pdf
    • http://files.mariepoza.com/uploads/1/3/1/0/131071057/8232186.pdf
    • http://files.lukalahfarm.com/uploads/1/3/0/9/130969790/ee1e72d.pdf
    • http://files.berende
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/kunipaladeferarusebites.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/lilofu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1576/4128/files/gotige.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51031200676.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35035436777.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/66254505883.pdf
    • https://cdn.shopify.com/s/files/1/0434/1058/7800/files/navogajolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9085/files/64935722398.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/siseta.pdf
    • https://cdn.shopify.com/s/files/1/0433/4475/6901/files/76291708190.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1573/files/45362948824.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007295.bin
adf16c4512be8615d1ad6ee8eac197853cab8986522303312a056f3286553766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7295 5036 bytes
font_01_sfnt_off0000838c.bin
d841092a7db20248fe3b7dd8b3de73e1416e6df4bca2dfdac3b6a7e431c9ad3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x838C 1720 bytes
font_02_sfnt_off00008c01.bin
d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C01 6068 bytes
font_03_sfnt_off00009bb2.bin
79f3fa45d0ff6ac42d5ea6ee3a2258528d18a492dc924b4d5070bb46095a2ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BB2 10468 bytes
font_04_sfnt_off0000bf90.bin
2aefa23dc12620c5f7753e312cb09ea0ba9017a4611e87255b892f25cb1cfbd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF90 16612 bytes

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