Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d56ca128be4eadd…

MALICIOUS

PDF

41.3 KB Created: 2020-09-03 13:46:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e83718c5624a8ddd8a8d16669440d8fe SHA-1: a022f6cc239bda77df80e6f8c48b274627521414 SHA-256: 9d56ca128be4eadd4bd0f8d9e76c8c708014a03c9b1297770af0307e365311a0
154 Risk Score

Malware Insights

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

The PDF file contains a link disguised as a free download for 'battle realms 1 free full version'. This link, https://ttraff.ru/wix?keyword=battle+realms+1+free++full+version, is identified as a malicious redirector. The document body is heavily obfuscated but contains the same lure text and URLs. The presence of numerous embedded links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to mask the malicious redirector. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=battle+realms+1+free++full+version
    • https://static.usrfiles.com/ugd/b8c837_b633df11384b4171b8969926aacb097b.pdf
    • https://static.usrfiles.com/ugd/ac0094_8a8fbfb4a9c04cc18ebee42648211da3.pdf
    • https://static.usrfiles.com/ugd/b8c837_090c96f2527b490692779b830e1be589.pdf
    • https://static.usrfiles.com/ugd/45e30f_151eec6dbaa344ca9483e1848abef46f.pdf
    • https://static.usrfiles.com/ugd/98e298_c1808f216d034a028715b7f6ba870815.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7266/files/what_is_belt_and_road_initiative.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/96226605796.pdf
    • https://cdn.shopify.com/s/files/1/0445/6228/4703/files/bending_stress_problems_and_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/3067/4597/files/parmenides_arje.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/99724681737.pdf
    • https://cdn.shopify.com/s/files/1/0463/9725/9931/files/ll_bean_flannel_sheets_king.pdf
    • https://cdn.shopify.com/s/files/1/0460/1076/1377/files/android_16_vs_cell_tfs.pdf
    • https://cdn.shopify.com/s/files/1/0428/3272/4124/files/fenupelade.pdf
    • https://cdn.shopify.com/s/files/1/0431/7164/3554/files/fibokovebujorowuxan.pdf
    • https://cdn.shopify.com/s/files/1/0435/1036/6362/files/24894246278.pdf
    • https://cdn.shopify.com/s/files/1/0429/2784/9639/files/creative_cloud_for_pc_free.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_off000063bb.bin
42039371374871eb69241f382e3c0f3b5c91f50faea75fa2f3bb101fd3b7bb64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BB 5076 bytes
font_01_sfnt_off000074f8.bin
86f6157d54ded0cd7922f6ee25823fa433301a14850d67043af3cf404f37dd26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F8 10420 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.