Malicious PDF — malware analysis report

Static analysis result for SHA-256 393c5f4451e19e0a…

MALICIOUS

PDF

50.8 KB Created: 2020-08-31 06:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dade8bbfa9d4877229605e936bc0b261 SHA-1: b180c80c98a1b3d7734bfd2c3050fbee1dc71631 SHA-256: 393c5f4451e19e0a63a153135b0ecb4ada9fe16235301a3184ba44ce2fd1ba75
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains keywords related to 'Panasonic viera bluetooth pairing' and the authoring application 'wkhtmltopdf', suggesting a lure to a potentially deceptive page. The presence of numerous external PDF links, many hosted on Shopify, further supports the idea of a link farm or content redirection strategy. The ML classifier also flagged this PDF with high confidence.

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.com/wix?keyword=panasonic+viera+bluetooth+pairing
    • https://cdn.shopify.com/s/files/1/0451/7065/5381/files/8409835204.pdf
    • https://cdn.shopify.com/s/files/1/0428/1414/4675/files/guilty_gear_dizzy_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/gabazakirejuserutewokan.pdf
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/femeweguvurafibek.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/55591376058.pdf
    • https://cdn.shopify.com/s/files/1/0433/5609/4614/files/ibps_clerk_maths_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/1966/5561/files/java_for_minecraft_1._7._2.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/10673624885.pdf
    • https://cdn.shopify.com/s/files/1/0447/9280/7590/files/69875379323.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/setup_genymotion_emulator_for_android_studio.pdf
    • https://cdn.shopify.com/s/files/1/0430/8697/1033/files/bursa_malaysia_nestle_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/sowugimixadi.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
stream_006_off00009a5e.bin
fe348a13fe1a40093fc04866eb115b26701eb15a4ba38105806284d87e6d1dd1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9A5E 10396 bytes
font_00_sfnt_off00007e6a.bin
62df7cfb17bebcb03c2d8334ad86d23168c159df4c2889c1a81792acf64ea663
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E6A 5396 bytes
font_01_sfnt_off000090b9.bin
78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
pdf-font-stream PDF embedded font (sfnt) at offset 0x90B9 2092 bytes