Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a1d56517e0085f…

MALICIOUS

PDF

66.6 KB Created: 2020-08-04 22:54:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8acd78f3fccc76720794488a23615c53 SHA-1: 63e72bee87b8222e51d8eaf715fc14203ca3a691 SHA-256: 52a1d56517e0085f1fc469937b5fd97a8377b492c2916bd40588a4db2abd299b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains multiple embedded URLs, with a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=materi+akuntansi+dasar+1+pdf'. Another critical heuristic identified a PDF link farm, indicating a large number of outbound links, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The file's purpose appears to be redirecting 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/pify?keyword=materi+akuntansi+dasar+1+pdf
    • http://xofole.shipmfl.net/uploads/1/3/1/0/131071252/2952148.pdf
    • http://files.thedwnews.com/uploads/1/3/1/8/131856827/gukame_tovafowavoned_kagafepavutexe_rikivokejafu.pdf
    • http://files.sungleedesign.com/uploads/1/3/0/7/130775518/lowotemotiroz_lelarukek.pdf
    • http://files.dyuddesign.com/uploads/1/3/2/6/132681409/puzojomafap.pdf
    • http://files.americanfriendsofthefatherbashfoundation.org/uploads/1/3/0/8/130814342/3722415.pdf
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/5618278058.pdf
    • https://cdn.shopify.com/s/files/1/0431/8763/4338/files/gotalukikajininirutedotok.pdf
    • https://cdn.shopify.com/s/files/1/0440/0313/1542/files/42500625907.pdf
    • https://cdn.shopify.com/s/files/1/0438/2185/8973/files/gikixexukunetefubozobuwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1056/3994/files/golirowekogusogugudusag.pdf
    • https://cdn.shopify.com/s/files/1/0429/2945/5271/files/ez_go_golf_cart_troubleshooting_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/39270545653.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17418425376.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/2954955472.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tanedikefiresemur.pdf
    • https://cdn.shopify.com/s/files/1/0435/6286/0699/files/html_color_code_transparent.pdf
    • https://cdn.shopify.com/s/files/1/0431/4464/2715/files/6451207738.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_off0000c72f.bin
992965e60f08b087740ecae2c15d6830565701d3ebbed1f0de6b608248d7d9e5
pdf-font-stream PDF embedded font (sfnt) at offset 0xC72F 5124 bytes
font_01_sfnt_off0000d8be.bin
9c74f8115eb225c1d3943d8d7eef282294afb3b8556581210e89c7787892e980
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8BE 10868 bytes