Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3ddc0bdda8f064…

MALICIOUS

PDF

42.9 KB Created: 2020-08-31 09:25:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 78eddc74d72f85b6f0ed89deb29fdb5c SHA-1: 3717f3d6e6e541d0dbf2748cf307037ebc57ea8c SHA-256: dd3ddc0bdda8f06432ca3ff9d479b5d6fd75d4fb80e12bafb3219353538d5310
120 Risk Score

Malware Insights

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

The PDF file contains a prominent link to 'ttraff.ru' which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Subway surfers mod apk for pc', suggesting a lure for users seeking game modifications. The presence of numerous embedded links, many pointing to benign-looking PDF files on static hosting services, indicates a link farm strategy, likely to improve search engine ranking for the lure term and direct users to malicious infrastructure.

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/wix?keyword=subway+surfers+mod+apk+for+pc
    • https://static.usrfiles.com/ugd/b8c837_72ae4956e8f64808af31c29f675bcc92.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bead4e9c68543a59eed809cbc10e605.pdf
    • https://static.usrfiles.com/ugd/e643da_a7e40c85bc514231a0d6b533038e036b.pdf
    • https://static.usrfiles.com/ugd/b8c837_8df74262b403471d8adc9018a728f5bf.pdf
    • https://static.usrfiles.com/ugd/238140_ea0bc31f1ae144268f44675d1234b8eb.pdf
    • https://static.usrfiles.com/ugd/3aee12_e913ebd1cd4840ccaa741a439b9510a2.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/75705105564.pdf
    • https://cdn.shopify.com/s/files/1/0433/7985/1414/files/4316047961.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/297512919.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0734/files/zamariwi.pdf
    • https://cdn.shopify.com/s/files/1/0437/6811/9448/files/agenda_2019_para_imprimir_gratis_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0440/6394/8950/files/mla_bibliography_style_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/5187/5481/files/felonivanepijabobup.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_off0000662d.bin
75bdb7ba5b060229f7b7c94ec871c96c2d4166482111163062590163a2c33ea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662D 5772 bytes
font_01_sfnt_off000079d6.bin
da246da4a8a9d65af4b6a63a729f9562bb022cf8731443d1e19402c4a1d99a49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D6 11056 bytes

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