Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7ead0ed59476c1c…

MALICIOUS

PDF

43.1 KB Created: 2020-08-21 15:30:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab582ee9b680ecf288c0cbb532bcf268 SHA-1: a4373277a9718a655c9da5116770ff0d94a017da SHA-256: e7ead0ed59476c1cfda2e49a2f6cc77f15fbc4dd37a9a60501812d5913e20e11
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, pointing to various PDF files hosted on Shopify and other domains. One of these links, 'https://ttraff.ru/pify?keyword=longman+dictionary+free++for+android', is flagged as a malicious redirector. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=longman+dictionary+free++for+android
    • http://files.smallbatchq.com/uploads/1/3/0/8/130814644/1ce237eaf92.pdf
    • http://files.compass-nj.com/uploads/1/3/2/8/132815123/e6c8c1c.pdf
    • https://cdn.shopify.com/s/files/1/0431/7678/8117/files/fezutuwun.pdf
    • https://cdn.shopify.com/s/files/1/0438/0655/6320/files/rasokutud.pdf
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/uscg_aux_directory.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wifufokamavobopizevotug.pdf
    • https://cdn.shopify.com/s/files/1/0428/3380/5471/files/repupesukajetixawo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5652/9565/files/curse_of_blackmoor_manor_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0431/0866/3456/files/16654932140.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/comune_di_campoformido_imu.pdf
    • https://cdn.shopify.com/s/files/1/0439/2982/9544/files/89357904314.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/que_es_acidosis_metabolica.pdf
    • https://cdn.shopify.com/s/files/1/0431/2698/0770/files/bumolubuzimulafi.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/650_x_2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9065/7951/files/90905942753.pdf
    • https://cdn.shopify.com/s/files/1/0435/3274/6906/files/womixepuj.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_off000051ab.bin
392941e5ef66409c9599af5bb81dddb84ffcc3a41f594ba736b56f55d4eb6835
pdf-font-stream PDF embedded font (sfnt) at offset 0x51AB 5176 bytes
font_01_sfnt_off00006337.bin
d535e481e264a7af4c824223f0a0bb1262fdb5010b7e9e35044c13af53bae4c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6337 11396 bytes
font_02_sfnt_off00008a49.bin
4c0a3f0893f5e69c6acf0c6b7f036872587aec6188c41bdd40a009ab43c82216
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A49 16060 bytes