Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d0e7633a42be6b0…

MALICIOUS

PDF

57.0 KB Created: 2020-08-04 06:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 619f0134aeac2c42b08d6585134d6b55 SHA-1: 7d23c980500a7e756a74902426d6ef8dedd26cfb SHA-256: 7d0e7633a42be6b0deed48a503e5ef8c5050fa16e9412dab8c9e8eda0aff023d
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=retinopatia+hipertensiva+articulo+pdf'. The document body is heavily obfuscated but appears to contain references to the redirector URL and other links hosted on shopify.com and other domains, suggesting a link farm or redirection attack. No scripts were extracted from this sample.

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=retinopatia+hipertensiva+articulo+pdf
    • http://files.tilliesschoolofperformingarts.com/uploads/1/3/1/3/131398194/zaxigam-fugis.pdf
    • http://files.ahta.info/uploads/1/3/1/4/131437491/duxagabudutufuw.pdf
    • http://files.simplegiftssyrupandsalmon.com/uploads/1/3/0/9/130969312/7823327.pdf
    • http://files.tremptrip.com/uploads/1/3/0/8/130874204/pokezulezavujaxosupu.pdf
    • http://files.minibaraddict.com/uploads/1/3/2/3/132302732/4191184.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/mathematics_for_economists.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/37177063676.pdf
    • https://cdn.shopify.com/s/files/1/0431/1531/5351/files/the_release_technique.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0433/2971/6374/files/2005660620.pdf
    • https://cdn.shopify.com/s/files/1/0433/0071/6694/files/tuvuxoxuxexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4230/7239/files/lanthanide_and_actinide.pdf
    • https://cdn.shopify.com/s/files/1/0432/3039/6574/files/13525972508.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lokilus.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/2312077498.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007e22.bin
79894b1eb6303dc777879a3d123a84aaa665b95498529e913931cb0ca9498364
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E22 5192 bytes
font_01_sfnt_off00008fc4.bin
2a50c95240edd075d3703169c247f537d2210410a3a78bf739788f2c095dc232
pdf-font-stream PDF embedded font (sfnt) at offset 0x8FC4 10272 bytes
font_02_sfnt_off0000b2f9.bin
e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
pdf-font-stream PDF embedded font (sfnt) at offset 0xB2F9 16204 bytes
font_03_sfnt_off0000c827.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0xC827 4324 bytes