Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f776dd61d1a5af8…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 11:57:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7045a0880d9cd15eef008e984b1b5321 SHA-1: 53a1e429c07389cc8a9e07fe5c2d90c8fcb86d40 SHA-256: 8f776dd61d1a5af880f9812454857a74c7ea68cd26a575a10d1c17e265d79104
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, https://ttraff.cc/wix?keyword=fallout+2+computer+voice+module, is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination.

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/wix?keyword=fallout+2+computer+voice+module
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/sazira.pdf
    • https://cdn.shopify.com/s/files/1/0437/4416/6037/files/benjamin_franklin_autobiography_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/jimuderemobogis.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/how_to_hang_sheetrock_in_garage.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4615/files/source_2_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/2001/6021/files/watch_survivor_s_remorse_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/9582/6336/files/zibubamebu.pdf
    • https://cdn.shopify.com/s/files/1/0431/4683/8173/files/converter_em_jpg_online_gratis_portugues.pdf
    • https://cdn.shopify.com/s/files/1/0439/0155/0760/files/audio_amplifier_schematic_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0429/9145/2314/files/ninixotebenakitora.pdf
    • https://cdn.shopify.com/s/files/1/0435/7108/5475/files/janubelexirexejudawifaxe.pdf
    • https://cdn.shopify.com/s/files/1/0437/8230/7989/files/cancer_cervicouterino_signos_y_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8471/7979/files/poxetapidosipa.pdf
    • https://cdn.shopify.com/s/files/1/0439/1872/1192/files/mapa_do_brasil_estados.pdf
    • https://static.usrfiles.com/ugd/b8c837_5f8021d585d54564b8246edea1919694.pdf
    • https://static.usrfiles.com/ugd/d54300_fdc7ca63e1d9496287a6ded68ad7f301.pdf
    • https://static.usrfiles.com/ugd/09273f_2148fbe5877c4127a84becfd06a0bc4d.pdf
    • https://static.usrfiles.com/ugd/b8c837_af2acc598fac46029e4a7365f27b633d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c9e3139bcce8430f922dac828fd2f76d.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_off00005f38.bin
fd11e1c0368db97de48750bdb6ca4e300d80027b4f05dd709bf6d33faddceaae
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F38 5188 bytes
font_01_sfnt_off000070cf.bin
48dbe86566d62d2b02ebee60c57e31049c4ba5ce82280fb7dd5492b5b8edc9ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x70CF 10420 bytes