Malicious PDF — malware analysis report

Static analysis result for SHA-256 2671341e226155d9…

MALICIOUS

PDF

39.2 KB Created: 2020-08-14 00:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffc431b8fac14e2931d409f590486dd1 SHA-1: 8967088b56a88bfbde492d1176dedb9c3d816208 SHA-256: 2671341e226155d9c77b5586794b94239d3b7c4fb974c81387a149b4824ed339
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to redirect users to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The document body, though heavily obfuscated, contains the URL that triggers the redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=i+stand+all+amazed+violin+sheet+music, which is likely used to deliver a secondary payload.

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=i+stand+all+amazed+violin+sheet+music
    • http://files.herdreamherdoctorate.com/uploads/1/3/1/3/131398360/semosonozifo.pdf
    • http://files.myentouragemusic.com/uploads/1/3/0/8/130814466/perepaluwo_zaxepokomoju_maxelaraka_kuradoj.pdf
    • http://files.darlingtonlecture.org.uk/uploads/1/3/1/4/131453213/pamarefizo.pdf
    • http://files.newhorizonstextilegroup.com/uploads/1/3/2/3/132303035/6811210.pdf
    • http://nerax.aimeekalmus.com/uploads/1/3/1/3/131379732/9920681.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6140/files/the_theoretical_minimum.pdf
    • https://cdn.shopify.com/s/files/1/0438/4748/3552/files/briquettes_mobile_al_menu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9173/8277/files/3471642364.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4602/files/16271038975.pdf
    • https://cdn.shopify.com/s/files/1/0428/2132/0870/files/71359898339.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vuvitew.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/98653401689.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51108684678.pdf
    • https://cdn.shopify.com/s/files/1/0431/6469/6732/files/adventure_time_season_4.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/babemimew.pdf
    • https://cdn.shopify.com/s/files/1/0446/3493/1363/files/paruxekuf.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/fusionner_deux_pdf_avec_adobe_acrobat_pro.pdf
    • https://cdn.shopify.com/s/files/1/0428/4101/4438/files/xagibotifogi.pdf
    • https://cdn.shopify.com/s/files/1/0440/7577/8198/files/averages_from_frequency_tables.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_off00005981.bin
42c94d137f4fefa70c897e15037c2b4f1e4d7bdd6c90770b510f5a1bdc044399
pdf-font-stream PDF embedded font (sfnt) at offset 0x5981 5128 bytes
font_01_sfnt_off00006ace.bin
f5f6c75c15b3efcb082f8ec2dd30f1ceaba6447c020691be952850977c273227
pdf-font-stream PDF embedded font (sfnt) at offset 0x6ACE 10736 bytes