Malicious PDF — malware analysis report

Static analysis result for SHA-256 c611bec79089fd98…

MALICIOUS

PDF

42.3 KB Created: 2020-08-25 09:32:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 607d0ba3f78a041a7013801419a45fd7 SHA-1: 70372e23ce50ee35120736bf06792e4824593eee SHA-256: c611bec79089fd987a2ac1f78d1673daec11ca75bdbf1f49495089b485c72e8d
128 Risk Score

Malware Insights

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

The PDF document contains a lure related to "Ambulatory surgical center coding guidelines" and embeds a large number of links, including a redirector to ttraff.ru. This suggests a link farm or SEO poisoning attack designed to redirect users to malicious content. The presence of numerous PDF links, many hosted on shopify.com, indicates an attempt to create a broad distribution network for potentially malicious content. No scripts were extracted from this sample.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=ambulatory+surgical+center+coding+guidelines
    • http://files.vermontawnings.com/uploads/1/3/0/7/130775219/rorafesivodefet.pdf
    • https://cdn.shopify.com/s/files/1/0447/9015/3365/files/language_games_activity_based_learning.pdf
    • https://cdn.shopify.com/s/files/1/0441/3584/1944/files/14121031383.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/minonow.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/file_to_merge.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/71338267014.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6200/files/42295811104.pdf
    • https://cdn.shopify.com/s/files/1/0432/7407/6315/files/savage_garden_i_want_you_jojo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9735/0554/files/90207437496.pdf
    • https://cdn.shopify.com/s/files/1/0448/2859/0242/files/angelcare_ac1100_manual.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_off0000599c.bin
a0589532ef02e12f4f58d37c49cd878a013d01508782708af13b12f954185f02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x599C 5372 bytes
font_01_sfnt_off00006bc4.bin
607ba296943b4f7911fecd46aa638148cd127cdcdb1765d1d7b950ce33215614		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC4 10152 bytes
font_02_sfnt_off00008e81.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E81 4324 bytes

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