Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8b7b13138d6a52…

MALICIOUS

PDF

41.9 KB Created: 2020-08-26 12:43:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3ed7a21313ac85d9ff8d16fd078bda06 SHA-1: 6a489e4199f7d0bac4d828194af08597af015731 SHA-256: 3a8b7b13138d6a5228f5e9ed90661c171b54309d2e1dbed3c5f842e632e64360
120 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary heuristic identifying it as a malicious redirector. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=musica+de+tercer+cielo+para+descargar+yo+te+extra%25C3%25B1are', is flagged as malicious. The document body appears to be corrupted or heavily encoded, but the presence of numerous links, many pointing to Shopify domains hosting other PDFs, suggests a link farm or SEO manipulation tactic, potentially leading to malicious 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/pify?keyword=musica+de+tercer+cielo+para+descargar+yo+te+extra%25C3%25B1are
    • http://files.legacyhorselogging.com/uploads/1/3/1/6/131636990/rakofidi-tuxujojaxeki.pdf
    • http://wofipele.theexpatspeechie.com/uploads/1/3/1/3/131381241/rofisejeben-gogumefovot-zusuzuwolujenu-foromudovu.pdf
    • http://buponamax.aberdeennaturalburials.co.uk/uploads/1/3/2/6/132681947/7d7cdfcc5a.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/bit_by_bit_salganik.pdf
    • https://cdn.shopify.com/s/files/1/0432/1358/6596/files/59645321768.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/lilagejejilowerokejip.pdf
    • https://cdn.shopify.com/s/files/1/0429/9853/0201/files/anganwadi_up_form.pdf
    • https://cdn.shopify.com/s/files/1/0437/8466/7297/files/wuwizibim.pdf
    • https://cdn.shopify.com/s/files/1/0430/6426/2818/files/sei_ira_beneficiary_designation_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/rupaul_drag_race_season_8_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0432/2118/8763/files/tetegabojojuvudovezana.pdf
    • https://cdn.shopify.com/s/files/1/0437/2817/5255/files/nezut.pdf
    • https://cdn.shopify.com/s/files/1/0430/1442/2677/files/xanogafilapevanoxediwepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/7211/1260/files/bikogibogefezezar.pdf
    • https://cdn.shopify.com/s/files/1/0432/7574/7491/files/wastewater_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/5238/3907/files/9301928073.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9121/files/97224016639.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_off00005944.bin
c40d5bedd3f3667645a7076cdb66fa13745c182d814c6f1c517b7db0c7cca7c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5944 5628 bytes
font_01_sfnt_off00006c44.bin
2e95a54696d748005da57eb398628210e1d4d042af5f33dac63a94c389e7c257
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C44 14144 bytes