Malicious PDF — malware analysis report

Static analysis result for SHA-256 9613f538821b4e02…

MALICIOUS

PDF

45.6 KB Created: 2020-08-21 00:52:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1ead60f0bd643e62b7a5606b1335c6d SHA-1: 9622e2d903fb9112f209660d03a0ab8285fe610a SHA-256: 9613f538821b4e02c70d67c423dcb105b1df7573496581933b5565f542682acc
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/pify?keyword=b1+file+archiver++for+pc'. This URL is likely part of a lure to trick users into downloading a password-protected archive, as indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic. The document also features a link farm, with the first URL pointing to 'https://cdn.shopify.com/s/files/1/0434/5744/6038/files/fovubasu.pdf', suggesting an attempt to distribute further malicious content or obscure the initial redirector.

Heuristics 4

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=b1+file+archiver++for+pc
    • http://files.cfbckids.org/uploads/1/3/0/7/130739933/vemegulo_pugax_rawomezitifabiz_ribaxedep.pdf
    • http://gamap.unlockyourhigherpotential.com/uploads/1/3/1/6/131606066/eb0d341cbd09ab5.pdf
    • http://files.maidtoshineservices.net/uploads/1/3/1/4/131437268/29f33e.pdf
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/fovubasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5942/1092/files/vujasage.pdf
    • https://cdn.shopify.com/s/files/1/0438/5302/1344/files/lepujilekenejateli.pdf
    • https://cdn.shopify.com/s/files/1/0431/4015/3505/files/rojenepelom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4589/files/zudanaxuvuperasowafat.pdf
    • https://cdn.shopify.com/s/files/1/0431/3219/0876/files/pixalamogajabiguda.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/90212657000.pdf
    • https://cdn.shopify.com/s/files/1/0429/5147/5351/files/wrterbuch_vietnamesisch_deutsch.pdf
    • https://cdn.shopify.com/s/files/1/0433/8538/9206/files/socialismo_y_capitalismo_libros.pdf
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/wugemataxesu.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/sharepoint_template_asset_management_system.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_off0000670c.bin
2fb8013cdc3c18833db063eeebabaf5af38b5bb8bdb95950dbcfa3aeec45fe6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 4688 bytes
font_01_sfnt_off0000770b.bin
9b0d82fc273aa46474fde765bf18aabf1da965670dde3762220d267f1106f506
pdf-font-stream PDF embedded font (sfnt) at offset 0x770B 10720 bytes
font_02_sfnt_off00009b68.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B68 4324 bytes