Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf9857045ac5bf67…

MALICIOUS

PDF

53.2 KB Created: 2020-08-15 04:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1bd6d2e77f402eff04f11e07f92cccc SHA-1: 02b2d6bf3a3667f5277f2590465cd58a7fd0ada8 SHA-256: cf9857045ac5bf67fc37a27878e29804670f90d65803219e97ec053a437646f0
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating a link to known malicious infrastructure. The document body and embedded links suggest a lure related to 'piano sheet music easy', which redirects to `https://ttraff.com/pify?keyword=lovely+piano+sheet+music+easy`. This URL is likely used to download a second-stage payload. The PDF also contains a large number of external links, many pointing to Shopify domains, which is characteristic of SEO link farm abuse.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=lovely+piano+sheet+music+easy
    • http://rogop.michellewilliamsgamaker.com/uploads/1/3/0/8/130873965/gumaxusi-kurevefasifufu-gafizulu-gujexogabozabiw.pdf
    • http://kikipukep.littledogcreative.org/uploads/1/3/1/4/131453329/d0540cb44f77.pdf
    • http://fiwenap.justjanetministries.com/uploads/1/3/1/3/131379874/1899247.pdf
    • http://ketutewon.gravitymech.com/uploads/1/3/0/7/130775476/5574198.pdf
    • http://zarixek.faithchapelberlin.com/uploads/1/3/1/4/131437462/bolekolomipod.pdf
    • https://cdn.shopify.com/s/files/1/0431/9019/0248/files/durafutup.pdf
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/23477664377.pdf
    • https://cdn.shopify.com/s/files/1/0430/3260/8921/files/kojitekefowa.pdf
    • https://cdn.shopify.com/s/files/1/0436/2171/2034/files/solid_red_background.pdf
    • https://cdn.shopify.com/s/files/1/0430/8955/9705/files/char_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/3071/6314/files/initial_counseling_army.pdf
    • https://cdn.shopify.com/s/files/1/0434/6599/8501/files/accident_report_form_template_free_uk.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2109/files/calendar_2020_ortodox.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/jetijuwobaravamovipiv.pdf
    • https://cdn.shopify.com/s/files/1/0433/0681/1560/files/gibevoxipa.pdf
    • https://cdn.shopify.com/s/files/1/0430/4227/5485/files/oregon_dmv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1332/5471/files/64340474871.pdf
    • https://cdn.shopify.com/s/files/1/0435/9254/8515/files/loruju.pdf
    • https://cdn.shopify.com/s/files/1/0431/7573/9560/files/kotiwuluzolajuxisumofusa.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_off00007de5.bin
41f2d95662d099f998a3b2b2f896e4e869b36a41c025c92944ce6a2358c937d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE5 5180 bytes
font_01_sfnt_off00008f6f.bin
4402ab6d07e08243ec12b6ecb34be6085ccb5cacb5637a2751cdfcc823a626d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6F 10112 bytes
font_02_sfnt_off0000b24b.bin
d973db94ba2c448c661c26f08d051ac794e7cb4f3c7daa33c2141e8036f071b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB24B 16100 bytes

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