Malicious PDF — malware analysis report

Static analysis result for SHA-256 27cf913f92aa2f27…

MALICIOUS

PDF

51.9 KB Created: 2020-08-12 11:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7690aa508a6497929453b079813433ee SHA-1: e62a21fc99f50f7544b62dc16a417962e6445122 SHA-256: 27cf913f92aa2f27a6c68e644e87a757433e368e06b6eafe0cf8296bc8cd3175
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains text related to an internal audit, suggesting a lure. The primary malicious IOC is the redirector URL, which likely leads to further malicious content. The file also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse.

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.cc/pify?keyword=audyt+wewn%25C4%2599trzny+w+praktyce+knedler+pdf
    • http://files.witnesslegend.com/uploads/1/3/0/8/130873979/5907491.pdf
    • http://gabewof.aylshamheritage.com/uploads/1/3/1/4/131406744/5365309.pdf
    • http://nogegena.5lanterns.com/uploads/1/3/0/7/130738732/ef163d3a0bf49.pdf
    • http://lesisax.maidonthemoonstainedglass.com/uploads/1/3/1/3/131384429/zutefi_feduxizuk_sotanutijivolix.pdf
    • https://cdn.shopify.com/s/files/1/0432/3259/2040/files/66918947715.pdf
    • https://cdn.shopify.com/s/files/1/0439/7439/4014/files/carolyn_keene_books.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/76318933575.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zeranosorijajigafa.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/que_es_una_historia_clinica_psicologica.pdf
    • https://cdn.shopify.com/s/files/1/0428/6044/5855/files/sebofabowetotuse.pdf
    • https://cdn.shopify.com/s/files/1/0433/9338/4599/files/sageworozonunuxoni.pdf
    • https://cdn.shopify.com/s/files/1/0430/3549/2503/files/85801199871.pdf
    • https://cdn.shopify.com/s/files/1/0434/8405/3669/files/kopowokotefijijigavelo.pdf
    • https://cdn.shopify.com/s/files/1/0443/0607/1708/files/bajind_marathi_kadambari_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/7151/2480/files/bunofoxejifuzovejuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/6538/4866/files/caverna_do_drago_requiem.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_off000070d2.bin
a49d2b9efae15835679ed2066f560685f0ca42a40de5e48ca83bd2bc709bc495
pdf-font-stream PDF embedded font (sfnt) at offset 0x70D2 5172 bytes
font_01_sfnt_off00008247.bin
8a481b257f3c01ac80595fbc27103fe8d49f850d411367a4ee995a820d2d9e31
pdf-font-stream PDF embedded font (sfnt) at offset 0x8247 16360 bytes
font_02_sfnt_off0000b269.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB269 4324 bytes